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msm physics

Total questions: 200

Worksheet time: 3hrs 20mins

Name
Class
Date
1.

The magnetic field inside a long straight solenoid carry

ing current is

a)

Zero

b)

decreases as we move towards its end

c)

increases as we move towards its end

d)

the same at all points

2.

Which of the following property of Proton can change while it moves freely in a magnetic field?

a)

mass

b)

speed

c)

velocity & momentum

d)

momentum

3.

A negatively charged particle projected towards west is deflected towards North by a magnetic field. The direction of magnetic field is:

a)

Towards south

b)

Towards East

c)

Downward

d)

upward

4.

Fleming left hand rule gives the direction of:

a)

Magnetic field

b)

Current

c)

Induced Current

d)

Motion (Force)

5.

Which of the following is the source of direct current:

a)

Car battery

b)

Car alternator

c)

Power house generator

d)

Bicycle dinemo

6.

A rectangular coil copper wires is rotated in a magnetic field. The direction of the induced current changes once in each:

a)

Two revolution

b)

One revolution

c)

Half revolution

d)

One-forth revolution

7.

The magnetic field lines near a long straight wire carrying current are:

a)

Straight lines

b)

Concentric rings

c)

Spiral lines

d)

Radial lines

8.

The device used for producing current is called a:

a)

Galvanometer

b)

Ammeter

c)

Motor

d)

Generator

9.

Which of the following is not the source of magnetic field:

a)

Moving charge

b)

Electric current

c)

Magnet

d)

A small piece of iron

10.

Name the device which converts mechanical energy into electric energy

a)

Motor

b)

Generator

c)

Heater

d)

Transformer

11.

The direction of magnetic field lines inside the magnet are:

a)

From North to south

b)

From south to north

c)

From North to North

d)

From South to South

12.

Magnetic field is maximum:

a)

At Two Poles

b)

At one pole

c)

At The center of the magnet

d)

Outside the magnet

13.

What is the pattern of magnetic field lines at the center of a current carrying solenoid:

a)

Concentric rings

b)

Straight lines

c)

Curved lines

d)

Radial lines

14.

What is the role of split rings in a electric moter

a)

Convert A.C. into D.C.

b)

Convert D.C. INTO A.C.

c)

Reverse the direction of Current

d)

Increases the current

15.

Force experienced by a current carrying conductor placed in a magnetic field is

a)

Perpendicular to its length

b)

Perpendicular to its magnetic field

c)

Perpendicular to its length & magnetic field

d)

Perpendicular to its width

16.

According to right hand thumb rule the direction of magnetic field in a current carrying straight conductor is denoted by:

a)

Thumb

b)

Curl fingers

c)

Middle finger

d)

First finger

17.

According to right hand thumb rule the direction of magnetic field in a current carrying circular coil is denoted by

a)

Thumb

b)

Middle finger

c)

Curl finger

d)

First finger

18.

Who discovered Magnetic Effect of Current:

a)

Faraday

b)

Fleming

c)

Newton

d)

Oersted

19.

In a glass slab the emergent ray is______ to incident ray

a)

Parallel

b)

Opposite

c)

Intersect

d)

None

20.

In a triangular prism how many lateral surfaces are there ?

a)

3

b)

2

c)

1

d)

0

21.

Angle formed between two lateral faces is called

a)

Angle of deviation

b)

Angle of joining

c)

Angle of prism

d)

Angle of triangle

22.

The emergent ray coming out of the prism would be

a)

Equal to the incident ray

b)

Would bend towards base of the prism

c)

Bends towards the direction of the incident ray

d)

All

23.

The band of 7 prominent colours is called

a)

Dispersion

b)

VIBGYOR

c)

Spectrum

d)

Scattering

24.

Which colour have more wavelength?

a)

Violet

b)

Indigo

c)

Orange

d)

Red

25.

The relation between speed and wavelength

a)

V = 1/ lamta

b)

V = lamta

c)

V directly proportional to lamta

d)

V inversely proportional to lamta

26.

Which colour bends the least

a)

Violet

b)

Red

c)

Blue

d)

Yellow

27.

Which colour travels faster

a)

Violet

b)

Red

c)

Blue

d)

None

28.

Which colour bends the least

a)

Violet

b)

Red

c)

Blue

d)

Yellow

29.

In which colour refraction would be more

a)

Violet

b)

Indigo

c)

Yellow

d)

Orange

e)

Red

30.

In which colour the speed would be less

a)

Violet

b)

Indigo

c)

Red

d)

Blue

31.

Any light that gives a spectrum similar to that of sunlight is called

a)

White coloured light

b)

White painted light

c)

White light

d)

Spectrum

32.

A rainbow is caused due to

a)

Spectrum

b)

Scattering

c)

Refraction

d)

Dispersion

33.

A rainbow is formed direction

a)

Opposite

b)

Same

c)

Parallel

d)

None

34.

Choose the phenomenon happening in the water droplets

a)

Dispersion reflection scattering

b)

Refraction dispersion scattering

c)

Dispersion reflection refraction

d)

All

35.

To see a rainbow, the sun should be

a)

Opposite to you

b)

Infront of you

c)

Behind you

d)

Between you and waterdroplets

36.

You might have observed the apparent random wavering or flickering of objects seen through a turbulent stream of hot air rising above a fire or a radiator. The air just above the fire becomes hotter than the air further up . The hotter air is lighter than the cooler air above it . So Which one is rarer medium

a)

Cooler air

b)

Hotter air

c)

Both

d)

None

37.

Stars are

a)

Extended

b)

Point size

c)

Enlarged

d)

Luminous ( light giving )

38.

The total variation in the amount of a large number of light entering our eyes From all the individual point sized sources will average out to

a)

0

b)

1

c)

3

d)

2

39.

The red light has wavelength about_____ than blue

a)

1.8 higher

b)

1.7 less

c)

1.8 less

d)

1.7 more

40.

____ is one of the best reflectors of light.

a)

Gold

b)

Silver

c)

Brass

d)

Aluminium

41.

Reflection of light have___laws.

a)

1

b)

2

c)

3

d)

4

42.

When light is available which image is formed.

a)

Real

b)

Virtual

c)

Erect

43.

If an object is placed at a distance of 10 cm in front of a plane mirror how far would it be from its image.

a)

10cm

b)

20cm

c)

30cm

d)

40cm

44.

Which mirror has a wider field of view?

a)

Convex

b)

Concave

c)

Plane

45.

Which equation related to ohm's law?

a)

V=IR

b)

R=V/I

c)

I=V/R

d)

All of the above

46.

When an obj is placed at focus then which type of image is formed?

a)

Real

b)

Virtual

c)

Inverted

d)

Both (1)and (3)

47.

A ray of light is incident on a plane mirror at an angle of 30°.what is the angle of refrection?

a)

10°

b)

20°

c)

30°

d)

40°

48.

Which type of image formed by plane mirror?

a)

Same size

b)

Erect

c)

Virtual

d)

All of the above

49.

Real image is always

a)

Erect

b)

Real

c)

Inverted

d)

Virtual

50.

A mirror having focal length –15 cm is _________________

a)

Plane mirror

b)

Concave mirror

c)

Convex mirror

d)

None of these

51.

Assertion: For observing the traffic at the hairpin bend in the mountains a plane mirror is preferred over convex or concave mirror.

Reason: A convex mirror has a much larger field view than a plane mirror or a concave mirror.

a)

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

b)

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

c)

Assertion is true but Reason is false.

d)

Assertion is false but Reason is true.

52.

Which of the following characteristics are correct for the image formed in a plane mirror?


I. Upright

II. Inverted

III. Real

IV. Same size as the object

V. Virtual

a)

I, II, III

b)

I, III, IV

c)

I, IV, V

d)

III, IV, V

53.

Why does the straw appear to be bent?

a)

light is reflected

b)

light is absorbed

c)

light is turned

d)

light is refracted

54.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
55.

A positive sign in the value of magnification indicates that the image is

a)

real

b)

virtual

c)

enlarged

d)

near

56.

A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it

a)

goes straight into the second medium

b)

bends towards the normal

c)

bends away from the normal

d)

does not enter at all

57.

Reflection is when light...

a)

Bends

b)

Bounces

c)

Absorbs

d)

transmits

58.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
59.

Which figure represents the path light takes through a converging lens?

a)
b)
c)
d)
60.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
61.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
62.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
63.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
64.
What is responsible for the Magnetic Field around Earth?
a)
The Earth's crust
b)
The Earth's molton iron core
c)
The Earth's mantel
d)
The Sun
65.
If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?
a)
Clockwise
b)
Counter-clockwise
c)
It will not move
d)
Need more information
66.
An electromagnet's poles may be reversed by:
a)
decreasing the voltage of the coil
b)
increasing the number of coils
c)
changing the direction of current flow
d)
altering the material used to make the coils
67.
Electric motors are devices that convert _____ energy into  _____ energy.
a)
electrical; mechanical
b)
mechanical; electrical
c)
chemical; potential
d)
mechanical; kinetic
68.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
69.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
70.

If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?

a)

The magnetic field

b)

The electrostatic field

c)

The piezoelectric effect

d)

The chemical reaction of the magnet and the filings

71.

What causes magnetism?

a)

the sun

b)

moving neutrons

c)

moving charges

d)

friction

72.

How can a wire become magnetic?

a)

point it north

b)

add a resistor

c)

heat it up

d)

run a current through it

73.

How can a wire become magnetic?

a)

point it north

b)

add a resistor

c)

heat it up

d)

run a current through it

74.
If you place the North pole of a magnet next to the South pole of another magnet, they will:
a)
Attract
b)
Repel
c)
Do nothing
d)
Shatter
75.
Iron and steel can become _____.
a)
magnetized
b)
transformed into plastics
c)
lined up to the poles
d)
part of the equator
76.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
77.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
78.
What would we call a nail that can pick up a paperclip because it is touching a magnet?
a)
temporary magnet
b)
poles
c)
force
d)
detector
79.
Electric current passing through a wire produces ________.
a)
permanent magnet
b)
magnetic field around wire
c)
compass
d)
geographic poles
80.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
81.

Q1) The most suitable material for making the core of an electromagnet is :

a)

a) Steel

b)

b) Iron

c)

c) Soft iron

d)

d) Aluminium

82.

Q2) Which of the following is not attracted by a magnet?

a)

(a) steel

b)

(b) cobalt

c)

(c) brass

d)

(d) nickel

83.

Q3) When a straight conductor is carrying current:

a)

a) There are circular magnetic field lines around it

b)

b) There are magnetic field lines parallel to the conductor

c)

c) There are no magnetic field lines

d)

d) None of the above

84.

Q4) A plotting compass is placed near the south pole of a bar magnet. The pointer of plotting compass will:

a)

(a) point away from the south pole

b)

(b) point parallel to the south pole

c)

(c) point towards the south pole

d)

(d) point at right angles to the south pole

85.

Q5) Two magnetic field lines:

a)

a) Intersect at neutral point

b)

b) Never intersect each other

c)

c) Intersect near north-pole or south pole

d)

d) Intersect at the mid point of the magnet

86.

Q6) A student learns that magnetic field strength around a bar magnet is different at every point. Which diagram shows the correct magnetic field lines around a bar magnet?

a)

a)

b)

b)

c)

c)

d)

d)

87.

Q7) The front face of a circular loop of a wire is North-pole, the direction of current in this face of the loop will be:

a)

a) Clockwise

b)

b) Anticlockwise

c)

c) Towards North

d)

d) Towards South

88.

Q8) Which of the following statements is incorrect regarding magnetic field lines?

a)

(a) The direction of the magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.

b)

(b) Magnetic field lines are closed curves.

c)

(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.

d)

(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.

89.

Q9) The magnetic field inside a long straight solenoid carrying current:

a)

a) Is zero

b)

b) Decrease as we move towards its end

c)

c) Is same at all points

d)

d) Increase as we move towards its end

90.

Q10) A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:

a)

(a) only in horizontal plane around the magnet

b)

(b) only in vertical plane around the magnet

c)

(c) in horizontal as well as in vertical planes around the magnet

d)

d) in all the planes around the magnet

91.

Q11) A student places some iron filings around a magnet. The iron fillings arrange themselves as shown in the image.

The student labelled four different regions around the magnet. Where would the magnetic field be the strongest?

a)

P

b)

Q

c)

R

d)

S

92.

Q12) The strength of magnetic field inside a long current-carrying straight solenoid is :

a)

a) More at the ends then at the center

b)

b) Minimum in the middle

c)

c) Same at all points

d)

d) Found to increase from one end to the another

93.

Q13) Which option explains Fleming’s left-hand rule to understand the working of a motor?

a)

(a) When a current carrying conductor is moved with a force, it creates the magnetic field.

b)

b) When a conductor is moved inside a magnetic field, current is produced in the conductor.

c)

(c) When the magnetic field is moved relative to the conductor, current is produced in the conductor.

d)

d) When a current carrying conductor is placed in a magnetic field, it experiences a force by magnetic field.

94.

Q14) The force on a current-carrying conductor when placed perpendicular in a uniform magnetic field.

a)

a) F=BIL

b)

b) F=B/IL

c)

c) F=L/BI

d)

d) F=I/BL

95.

Q15) A student inserts a bar magnet in the coil. The student observes deflection in the galvanometer connected to the coil. What will happen if the magnet is continuously getting in and out of the coil?

a)

a) the current induced in the coil will increase

b)

(b) the current will change its direction continuously

c)

(c) the magnetic field will create a motion in the coil

d)

d) the magnetic field of the bar magnet would keep decreasing

96.

Q16) A metal rod PQ is placed in the magnetic field. The ends of the rod are connected with a battery using wires.

Where will the rod move?

a)

(a) upward

b)

(b) downwards

c)

(c) into the field

d)

(d) out of the field

97.

Q17) A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside a solenoid:

a)

a) decrease

b)

b) Will increase

c)

c) Will become Will zero

d)

d) Will remain unaffected

98.

Q18) Assertion (A): As the speed of the coil in the motor increases, there is reduction in the current flowing through it.

Reason (R): During rotation in an electric motor, some induced current is produced.

a)

(a) (A) is incorrect and (R) is correct.

b)

(b) (A) is correct and (R) is incorrect.

c)

(c) Both (A) and (R) are correct but (R) is not the correct explanation of (A).

d)

(d) Both (A) and (R) are correct but (R) is the correct explanation of (A).

99.

Q21) A student makes an arrangement to study electromagnetic induction, as shown.

She changes the arrangement in four different ways.

Trial

1.Moves the coil to the left away from the magnet.

2.Moves the magnet to the right away from the coil.

3.Moves both coil and magnet towards each other.

4.Moves both coil and magnet in the same direction at the same speed.

In which trial would the galvanometer remain undeflected?

a)

1

b)

2

c)

3

d)

4

100.

Q22) Appliances that have a metal body are generally connected to the earthing wire. What is the reason to earth these wires?

a)

(a) to prevent excess of current

b)

(b) to prevent the leakage of current

c)

(c) to provide extra current to appliance

d)

d) to provide high resistance to the appliance

101.

WHAT IS THE MELTING POINT OF TUNGSTEN IN DEGREE CELSIUS?

a)

ABOUT 3460

b)

ABOUT 5437

c)

ABOUT 3380

d)

ABOUT 2225

102.

WHICH DEVICE IS USED FOR MEASURING SMALL CURRENT ?

a)

VOLTMETER

b)

DOUBLE AMMETER {SPECIFIC}

c)

GALVANOMETER

d)

AMMETER

103.

WHICH OF THIS IS GOOD CONDUCTOR OF ELECTRICITY?

a)

AMMETER

b)

VOLTMETER

c)

BOTH A AND B

d)

NON OF THESE

104.

WHICH GAS PREVENTS TUNGSTEN PRESENT IN THE BULB TO BE OXIDISED?

a)

HYDROGEN GAS

b)

NITROGEN

c)

ARGON

d)

ALL OF THE ABOVE

105.

WHICH OF THESE IS GOOD CONDUCTOR OF HEAT AND POOR CONDUCTOR OF ELECTRICITY?

a)

LEAD

b)

MICA

c)

NICHROME

d)

BORAX

106.

1 horsepower is equal to

a)

700 WATT

b)

100 WATT

c)

746 WATT

d)

627 WATT

107.

THE COMMERCIAL UNIT OF ELECTRIC ENERGY IS

(a)  

108.

The equivalent resistance of the series combination of two equal resistances is S. When they are joined in parallel, the total resistance is “P”. If S = nP, what is the value of “n”?

a)

2

b)

1

c)

4

d)

3

e)

6

109.

The resultant value of resistances each of value r ohms when connected in parallel is x, when these resistances are connected in series the resultant resistance is : (HOTS)

a)

(x/n)2

b)

N^2X

c)

nx

d)

(x/n)

110.

According to ohms law,

a)

The resistance increases with the increases in current.

b)

The resistance increases with the increases in voltage.

c)

The resistance and current both increases wiTh the increases in voltage.

d)

The current increases with the increases in voltage.

111.

Which instrument is used to measure potential difference

a)

Ammeter

b)

Voltmeter

c)

Rheostat

d)

All of these

112.

This is symbol of

a)

Resistor

b)

Cell

c)

Variable resistance

d)

Ammeter

113.

Work done in moving a charge of 2C across 2 points having a potential difference of 12V is

a)

6J

b)

24J

c)

12J

d)

48J

114.

Which is the correct mathematical form of Ohm"s law

a)

I = V R

b)

R = I V

c)

V = I / R

d)

V = I R

115.

Resistance of conductor depends on its

a)

Length

b)

Area of cross section

c)

Nature of material

d)

All of these

116.

SI unit if resistivity

a)

Ohm

b)

Ampere

c)

Ohm metre

d)

Volt

117.

If 3 resistors of capacity 1 ohm ,,2ohm and 3ohm are connected in parallel then equivalent resistance in the circuit is

a)

More than 3 ohm

b)

Less than 1 ohm

c)

More than 2 ohm

d)

6 ohm

118.

This is

a)

Ohms law

b)

Faraday's law

c)

Flemmings law

d)

Joules law of heating

119.

Electric bulb filament is made of tungsten because it has

a)

High MP and high resistance

b)

High MP and low resistance

c)

Low MP and high resistance

d)

Low MP and low resistance

120.

The rate of flow of electric charge is

a)

Electric resistance

b)

Electric current

c)

Potential differnce

d)

Power

121.

Flow of one Coulumb of charge per second is

a)

1 W

b)

1A

c)

1 V

d)

1 Ohm

122.

The property of a conductor to resist the flow of charges through it is

a)

Power

b)

Potential difference

c)

Electric current

d)

Resistance

123.

Which device can be used to change the resistance in the electric circuit

a)

Fuse

b)

Rheostat

c)

Switch

d)

Battery

124.

Electic current throug the circuit is

a)

1 A

b)

36A

c)

6A

d)

0.5 A

125.

Total resistance in the circuit if 2 resistors of 2 ohm each are connected in parallel

a)

2 ohm

b)

1 ohm

c)

4 ohm

d)

1/4 ohm

126.

It's a safety device which protects electrical appliances by stopping flow of any unduly high current and which works on joules law of heating

a)

Electric wire

b)

Rheaostat

c)

Fuse

d)

None of this

127.

Kilowatt hour is commonly known as

a)

Watt

b)

Power

c)

Unit

d)

Voltage

128.

Keeping potential difference constant if resistance is doubled then electric current is

a)

Doubled

b)

Halved

c)

Reduced to zero

d)

Tripled

129.

SI unit of electric charge is

a)

Watt

b)

Coulomb

c)

Ampere

d)

Ohm

130.

Which statement about fuse is wrong

a)

It's a safety device

b)

It works on joules law if heating

c)

It has high Melting point

d)

Its connected in seris with the device

131.

The potential at a point is 20V. The work- done in bringing a charge of 0.5 C from infinity to this point will be

a)

20 J

b)

10 J

c)

5 J

d)

40J

132.

A charge is taken from point A to B . The work done per unit charge in this process is called

a)

the potential at A

b)

the potential at B

c)

the potential difference between B and A

d)

the current from A to B

133.

Joule/coulomb is same as

a)

watt

b)

volt

c)

ampere

d)

ohm

134.

Voltmetre is used to measure

a)

potential difference

b)

electric current

c)

electric power

d)

resistance

135.

In metals

a)

all the electrons are bound to their parent atom

b)

all electrons are free to move

c)

there are no electrons

d)

some electrons are free to move

136.

The current in wire depends

a)

only on the potential difference applied

b)

only on the resistance of the wire

c)

on both of them

d)

none of them

137.

Consider the following incomplete statement " Ohms law relates potential diffrence with ........... for a given resistance" The suitable choice for missing word is

a)

Power

b)

Energy

c)

Current

d)

Time

138.

Resistance of a cylindrical piece of rubber is (a)   then that a similar piece of copper

139.

The Kilowatt hour is the unit of (a)  

140.

The equivalent resistance of two equal resistance in parallel is (a)   the values of each resistance

141.

How much charge flows through a wire in 10 minutes if the current through it is 2.5 A ?

a)

1000 C

b)

1200 C

c)

1500 C

d)

1800 C

142.

Electrical resistivity of a given metallic wire depends upon

a)

its length

b)

its thickness

c)

its shape

d)

nature of the material

143.

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

a)

1020

b)

1016

c)

1018

d)

1023

144.

What is the minimum resistance which can be made using five resistors each of 1/5 ohm?

a)

1/5 ohm

b)

1/25 ohm

c)

1/10 ohm

d)

25 ohm

145.

What is the minimum resistance which can be made using five resistors each of 1/5 ohm?

a)

1/5 ohm

b)

10 ohm

c)

5 ohm

d)

1 ohm

146.

Unit of electric power may also be expressed as

a)

volt ampere

b)

kilowatt hour

c)

watt second

d)

joule second

147.

Two resistors of resistance 2 ohm and 4 ohm when connected to a battery will have

a)

same current flowing through them when connected in parallel

b)

same current flowing through them when connected in series

c)

same potential difference across them when connected in series

d)

different potential difference across them when connected in parallel

148.

10. A cylindrical conductor of length l and uniform area of crosssection A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross sec

a)

A/2

b)

3A/2

c)

2A

d)

3A

149.
A material in which electrons are not able to move easily 
a)
Circuit 
b)
Insulator 
c)
Resistance 
d)
Conductor
150.
The process of transferring charge by touching or rubbing 
a)
Induction 
b)
Conduction 
c)
Friction 
d)
Conductor 
151.

According to ohm's law,

a)

The resistance increases with the increases in current.

b)

The resistance increases with the increases in voltage.

c)

The resistance and current both increases wiTh the increases in voltage.

d)

The current increases with the increases in voltage.

152.

According to ohm's law,

a)

The resistance increases with the increases in current.

b)

The resistance increases with the increases in voltage.

c)

The resistance and current both increases wiTh the increases in voltage.

d)

The current increases with the increases in voltage.

153.

Current carriers in Electrolyte are/is

a)

Free electrons

b)

Holes

c)

Electrons and holes both

d)

Positive and negative ions

154.

An electrical component that we use in electronics circuits to limit current though an active component or to reduce voltage in the circuit.

a)

Capacitor

b)

Current

c)

Resistor

d)

Ancestor

155.

What is the unit of measurement for resistance?

a)

Voltage

b)

Ampere

c)

Watts

d)

Ohms

156.

This is symbol of

a)

Resistor

b)

Cell

c)

Variable resistance

d)

Ammeter

157.

Which instrument is used to measure potential difference

a)

Ammeter

b)

Voltmeter

c)

Rheostat

d)

All of these

158.

Work done in moving a charge of 2C across 2 points having a potential difference of 12V is

a)

6J

b)

24J

c)

12J

d)

48J

159.

Which is the correct mathematical form of Ohm"s law

a)

I = V R

b)

R = I V

c)

V = I / R

d)

V = I R

160.

Resistance of conductor depends on its

a)

Length

b)

Area of cross section

c)

Nature of material

d)

All of these

161.

SI unit if resistivity

a)

Ohm

b)

Ampere

c)

Ohm metre

d)

Volt

162.

Flow of one Coulumb of charge per second is

a)

1 W

b)

1A

c)

1 V

d)

1 Ohm

163.

Keeping potential difference constant if resistance is doubled then electric current is

a)

Doubled

b)

Halved

c)

Reduced to zero

d)

Tripled

164.

Electrical potential is ------------

a)

scalar quantity

b)

vector quantity

c)

both scalar and vector

d)

neither scalar nor vector

165.

kilowatt hour is unit of

a)

energy

b)

power

c)

momentum

d)

force

166.

SI unit of resistivity (specific resistance) is ----------

a)

ohm

b)

ohm meter

c)

volt

d)

ampere

167.

How is a voltmeter connected in the circuit to measure the potential difference between two points?

a)

series

b)

parallel

c)

according to the situation either series or parallel

d)

none

168.

SI unit of electric current is -----------

a)

volt

b)

coulomb

c)

ampere

d)

ohm

169.

SI unit of resistance is ------------

a)

ohm

b)

volt

c)

ampere

d)

coulomb

170.

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, power consumed will be ---------------. [Use P = (V X V)/R]

a)

100 W

b)

75 W

c)

50 W

d)

25 W

171.

The property of a conductor by which it obstructs the flow of current is known as ------------------ of the conductor

a)

voltage

b)

conductivity

c)

power

d)

resistance

172.

What is the direction of conventional current?

a)

positive terminal to negative terminal

b)

negative terminal to positive terminal

c)

depends on the condition

d)

none

173.

Ammeter is used to measure ----------------.

a)

voltage

b)

electric current

c)

resistance

d)

resistivity

174.

Ohm's law is applicable only when ----------------

a)

temperature remains constant

b)

temperature increases

c)

temperature decreases

d)

none

175.

Keeping the potential difference constant, the resistance of the circuit is halved, the current will become --------------

a)

four times

b)

half

c)

double

d)

one-third

176.

Electrical resistivity of a given metallic wire depends upon ----------

a)

its length

b)

its thickness

c)

its shape

d)

nature of the material

177.

What is the SI unit of electric charge?

a)

ampere

b)

volt

c)

ohm

d)

coulomb

178.

What is the maximum resistance which can be made using five resistor each of 1/5 ohm?

a)

1/5 ohm

b)

10 ohm

c)

5 ohm

d)

1 ohm

179.

What is the minimum resistance which can be made using five resistors each of 1/5 ohm?

a)

1/5 ohm

b)

1/25 ohm

c)

1/10 ohm

d)

1/25 ohm

180.

When a 4 ohm resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is --------------

a)

0.5

b)

1

c)

2

d)

4

181.

If the current flowing through a fixed resistor is halved, the heat produced in it will become -----------------

a)

one-fourth

b)

one-half

c)

double

d)

four times

182.

The solution which conducts electricity is known as --------

a)

conductor

b)

electrolyte

c)

insulator

d)

none

183.

The work done to bring unit positive charge from infinity to a point in an electric field is known as ----------

a)

potential

b)

resistance

c)

current

d)

charge

184.

An electric iron of resistance 20 ohm takes a current of 5 A. Calculate the heat developed in 30 s. [Use H = I X I X R X t]

a)

1000 joules

b)

2000 joules

c)

15000 joules

d)

30000 joules

185.

An electric iron has a rating of 750 W, 220 V. Calculate current passing through it. [Use P = IV]

a)

5 A

b)

6 A

c)

3.4 A

d)

7 A

186.

Calculate the amount of charge that would flow in 1 hour through the element of an electric bulb drawing a current of 0.2 A. [Use I = Q/t]

a)

300 C

b)

320 C

c)

700 C

d)

720 C

187.

Calculate resistance of an electric bulb which allows a 10 A current when connected to 220 V power source. [Use V = IR]

a)

10 ohm

b)

12 ohm

c)

22 ohm

d)

32 ohm

188.

When a 12 V battery is connected across an unknown resistor, there is a current 2.5 mA in the circuit. Find the value of resistance of the resistor. [Use V = IR]

a)

1000 ohm

b)

2000 ohm

c)

4800 ohm

d)

6700 ohm

189.

In a filament lamp, in what form is most of the energy lost?

a)

Heat

b)

Sound

c)

Kinetic energy

d)

Radio waves

190.

What is power?

a)

The number of repetitions of squats a body-builder can perform

b)

The number of cylinders in a car

c)

The rate at which energy is absorbed

d)

The rate at which energy is transferred

191.

What is the formula for power?

a)

P = E⁄t

b)

P = t⁄E

c)

P = E⁄2t

d)

P = 2E⁄t

192.

Calculate the power of an appliance that uses 1000 joules of energy in 5 seconds.

a)

100 W

b)

200 W

c)

300 W

d)

400 W

193.

Power, potential difference and current are correctly related by which equation?

a)

P = I x V

b)

P = 2I x V

c)

P = I⁄V

d)

P = I⁄2V

194.

What is the voltage of an appliance if it uses 200 J per second when supplied with a current of 5 A?

a)

10 V

b)

20 V

c)

30 V

d)

40 V

195.

This is the symbol for a...

a)

Motor

b)

Ammeter

c)

Bulb

d)

Voltmeter

196.

This is the symbol for a...

a)

Bulb

b)

Voltmeter

c)

Ammeter

d)

Motor

197.

When a beam of white light falls on a glass prism, the colour of light which will deviate least is:

a)

Violet

b)

Red

c)

Green

d)

Blue

198.

Which of the following figures correctly represents the passage of white light through prism?

a)

a

b)

b and c

c)

c

d)

d

199.

The star appear shifted from their actual position due to the phenomenon of:

a)

Diffraction of light

b)

Scattering of light

c)

Refraction of light

d)

Reflection of light

200.

Which of the following graph represents the correct variation of angle of incidence (i) and angle of deviation (δ)?

a)

a

b)

b

c)

c

d)

d

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10th - 12th Grade