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PHY-ELECTRIC CURRENTS AND ITS EFFECTSTS

Total questions: 117

Worksheet time: 58mins

Name
Class
Date
1.

Our body is a ……………… of electricity.

a)

Good Conductor

b)

Bad Conductor

c)

Bad Insulator

d)

Good Insulator

2.

Why people prefer to put an MCB in their house instead of fuse nowadays- (Choose one or more options)

a)

They are cheap.

b)

Fuses need to be changed every time they blow out.

c)

MCBs can be controlled manually.

d)

Fuses are expensive.

3.

what is an electric bulb

a)

an electrical appliance

b)

a resistor

c)

a insulator

d)

a onductor

4.

Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

a)

Directed to the right

b)

Directed to the left

c)

Equal to the magnetic field

d)

n the same direction as the magnetic field

5.

The filament of A bulb, is a wire of

a)

High resistivity, low melting point

b)

Low resistivity, low melting point

c)

High resistivity, high melting point

d)

Low resistivity, high melting point

6.

A bell only rings one time when switched on (The gong is hit only one time) because-

a)

Insufficient Electricity

b)

Electromagnet turned to or replaced by a permanent magnet

c)

Wiring Problem

d)

A mystical force

7.

In making a battery

(a) the positive terminal of one cell is connected to the negative terminal of the next cell

(b) the positive terminal of one cell is connected to the positive terminal of the next cell

(c) the negative terminal of one cell is connected to the negative terminal of the next cell

(d) none of the above

a)

a

b)

b

c)

c

d)

d

8.

·Who was the first person to notice the deflection of compass needle everytime the current passes through the wire.

a)

Hans Christian Andersen

b)

Hans Christian oersted

c)

Hans Christian mandorson

d)

None of the above

9.

Which of these following cannot be harmed by electric current

a)

Plastic

b)

Rubber

c)

A & B

d)

All of the above

10.

Can we magnetise an iron object with electromagnet

a)

Yes

b)

No

11.

Which one of the following is based on the heating effect of current?

a)

Geyser

b)

Hair-dryer

c)

Electric Kettle

d)

All of the options

12.

In which direction do electrons flow in circuit

a)

POsitive to negative

b)

negative to positive

c)

do not move

13.

What are electrons in electric circuit

a)

charge carriers

b)

flowing particles which form electric current

c)

misconception

d)

electric current pushers

14.

When an electric current flows through a copper wire AB as shown in Figure, the wire:

a)

deflects a magnetic needle placed near it

b)

becomes red hot

c)

gives electric shock

d)

behaves like a fuse

15.

When electricity flows through heating coil it becomes ________ hot and gives out _______ energy, which is to put in practical use.

a)

Red, heat

b)

White, heat

c)

Red, light

d)

White, light

16.

In olden days (a)   were fitted in all buildings to prevent damage to electrical circuits and possible fires by high volt of current.(Please answer in small letters)

17.

Urvashi made a circuit and saw that some pins kept nearby were being attracted to the wires this is due to the __________ effect of electric current.

a)

Heating

b)

Gravitational

c)

Magnetic

d)

Attractive

18.

When an electric current flows through the wire it gets heated it is known as the heater

a)

True

b)

False

19.

Ram saw a coil of wire glowing red hot in his room heater. What is it?

a)

Glower

b)

Just a coil of wire that became very hot

c)

Element

d)

A new kind of bulb

20.

If a positive terminal of one cell is connected to the negative terminal of the next cell it is known as

a)

Electric current

b)

Fuse

c)

Battery

d)

Element

21.

Which of these are features of electro magnet usually? Choose one or more options

a)

Temporary

b)

Strong

c)

Needs Electricity

d)

Weak

22.

A battery is a combination of

(a) only single cell

(b) only two cells

(c) two or more cells

(d) None of the above

a)

a

b)

b

c)

c

d)

d

23.

What is Voltage

a)

Which creates current

b)

which pushes current

c)

which resists current

d)

which is a break in circuit

24.

The heating coils/elements of different electrical appliances are usually made from ________ or ________ wires.

1. Copper 2. Aluminum 3. Nichrome 4. Tungsten

a)

1 & 2

b)

1 & 4

c)

2 & 4

d)

3 & 4

25.

How is electric potential measured

a)

Voltmeter

b)

Galvanometer

c)

Ammeter

d)

It cannot be measured= infinity

26.

Scientist (a)   was the first to notice the deflection of compass whenever current was passed through the wire near it. (Please answer in small letters)

27.

The coil of wire contained in an electric heater is known as

a)

component

b)

element

c)

circuit

d)

spring

28.

Who discovered the magnetic field of electric current?

a)

Hans Christin Oyster

b)

James Kristin Oersted

c)

Lans Christin Oestred

d)

Hans Christian Oersted

29.

LEDs full form is-

a)

Light Era Diode

b)

Light Etern Dot

c)

Light Emitting Dot

d)

Light Emitting Diode

30.

Where can the key or switch be placed in the circuit?

a)

The left side of the battery

b)

The right side of the battery

c)

Can be placed anywhere in the circuit

d)

Near the positive terminal of the bulb

31.

Which of the following devices usually can break a circuit - (Choose one or more options)

a)

Switches

b)

Fuses

c)

MCBs

d)

Miniature Circuit Breakers

32.

When electric current flows through the metal filament of the bulb it gets heated to very high temperature and becomes______ hot and start emitting _______.

a)

White, light

b)

Red, light

c)

White, heat

d)

Red, heat

33.

Wires made from some special materials melt quickly and break when a large electric current passes through it.these wires are used to make

a)

Fuses

b)

Electric fuses

c)

A&B

d)

Electromagnet

34.

Which of these is the symbol of a bulb?

a)
b)
c)
d)
35.

The magnitude of magnetism produced by an electric current in a wire depends upon- (a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases

a)

Both a, b

b)

Only a

c)

Only b

d)

None

36.

What is Electromagnet

(a)  

37.

Electromagnets could be used in particular devices

a)

TRUE

b)

FALSE

38.

Identify the symbol-

a)

Electric Bulb

b)

Electric Cell

c)

Battery

d)

Switch in ON position

e)

Switch in OFF position

39.

Connection of more than one device/ appliance to a single socket is called-

a)

Overloading

b)

Short circuit

c)

Both

40.

Identify the poles of the magnet in the given figure.

a)

NORTH

b)

SOUTH

c)

One is north and the other is south

d)

Can't predict

41.

When the switch is on the circuit from the positive to negative terminal is complete

a)

True

b)

False

42.

A fuse wire is a wire of-

a)

High resistivity and low melting point

b)

High resistivity and high melting point

c)

Low resistivity and low melting point

d)

Low resistivity and high melting point

43.

When current is switched 'on' of a bulb it converts _______ energy into _______ energy.

a)

Electrical, heat

b)

Electrical, light

c)

Electrical, mechanical

d)

Electrical, sound

44.

What is the full form of MCB-

a)

Massive Circuit Breaker

b)

Massive Circuit Body

c)

Mighty Circuit Breaker

d)

Miniature Circuit Breaker

45.

The amount of heat produced in a wire depends on

a)

material

b)

length

c)

thickness

d)

all of these

46.

Which mark is necessary on electric appliances?

a)

AGMARK

b)

ISI

c)

FICCI

d)

KSK

47.

The device used to make or break an electric circuit is

a)

Resistor

b)

Battery

c)

Switch

d)

Ammeter

48.

A common household device, that do not use an electromagnet in its working, is-

a)

The electric bell

b)

Geyser

c)

Telephone

d)

Loud speaker

49.

Electric Bell works on the principle of-

a)

Magnetism

b)

Electromagnetism

c)

Gravitation

d)

Static Electricity

50.

When current is switched on in an electric bell, it converts _______ energy into _______ energy.

a)

Electrical, light

b)

Electrical, sound

c)

Electrical, heat

d)

Mechanical, sound

51.

A device used to measure the amount of electric current flowing through a circuit.

a)

Ammeter

b)

Voltmeter

c)

Resistor

d)

Battery

52.

When does an electromagnet lose its magnetic Property?

a)

When current is very high

b)

When its switched off

c)

When heat is very high

d)

When current is switched on

53.

Current flows through the circuit when the circuit is in the _________________condition.

a)

Broken

b)

Open

c)

Closed

d)

Incomplete

54.

Who was the first to observe the magnetic effect of electric current?

a)

Faraday

b)

Oersted

c)

Volta

d)

Ampere

55.

A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then

a)

The wire will experience a force along the direction of the magnetic field

b)

The wire will not experience any force

c)

The wire will experience the torque

d)

The wire will experience a perpendicular force

56.

A fuse wire is made up of alloy

a)

Nichrome

b)

Tin-lead

c)

Manganin

d)

Constantan

57.

An Electric charge in a uniform motion produces

a)

An Electric Field only

b)

An Magnetic field only

c)

Both Electric Field & Magnetic field

d)

Neither of them

58.

The magnetic field around a current carrying coil

a)

Lasts for three hours

b)

Lasts as long as current flows through it

c)

Lasts till its half-life period

d)

Is permanent

59.

Copper wires are used as connecting wires because

a)

Copper has very high melting point

b)

Copper wires are very thick wires

c)

Copper wires offer a lower resistance

d)

None of these

60.

Our body is a ……………… of electricity.

a)

Good Conductor

b)

Bad Conductor

c)

Bad Insulator

d)

Good Insulator

61.

Why people prefer to put an MCB in their house instead of fuse nowadays- (Choose one or more options)

a)

They are cheap.

b)

Fuses need to be changed every time they blow out.

c)

MCBs can be controlled manually.

d)

Fuses are expensive.

62.

what is an electric bulb

a)

an electrical appliance

b)

a resistor

c)

a insulator

d)

a onductor

63.

The filament of A bulb, is a wire of

a)

High resistivity, low melting point

b)

Low resistivity, low melting point

c)

High resistivity, high melting point

d)

Low resistivity, high melting point

64.

A bell only rings one time when switched on (The gong is hit only one time) because-

a)

Insufficient Electricity

b)

Electromagnet turned to or replaced by a permanent magnet

c)

Wiring Problem

d)

A mystical force

65.

In making a battery

(a) the positive terminal of one cell is connected to the negative terminal of the next cell

(b) the positive terminal of one cell is connected to the positive terminal of the next cell

(c) the negative terminal of one cell is connected to the negative terminal of the next cell

(d) none of the above

a)

a

b)

b

c)

c

d)

d

66.

·Who was the first person to notice the deflection of compass needle everytime the current passes through the wire.

a)

Hans Christian Andersen

b)

Hans Christian oersted

c)

Hans Christian mandorson

d)

None of the above

67.

Which of these following cannot be harmed by electric current

a)

Plastic

b)

Rubber

c)

A & B

d)

All of the above

68.

Can we magnetise an iron object with electromagnet

a)

Yes

b)

No

69.

Which one of the following is based on the heating effect of current?

a)

Geyser

b)

Hair-dryer

c)

Electric Kettle

d)

All of the options

70.

In which direction do electrons flow in circuit

a)

POsitive to negative

b)

negative to positive

c)

do not move

71.

What are electrons in electric circuit

a)

charge carriers

b)

flowing particles which form electric current

c)

misconception

d)

electric current pushers

72.

When electricity flows through heating coil it becomes ________ hot and gives out _______ energy, which is to put in practical use.

a)

Red, heat

b)

White, heat

c)

Red, light

d)

White, light

73.

In olden days (a)   were fitted in all buildings to prevent damage to electrical circuits and possible fires by high volt of current.(Please answer in small letters)

74.

Urvashi made a circuit and saw that some pins kept nearby were being attracted to the wires this is due to the __________ effect of electric current.

a)

Heating

b)

Gravitational

c)

Magnetic

d)

Attractive

75.

When an electric current flows through the wire it gets heated it is known as the heater

a)

True

b)

False

76.

Ram saw a coil of wire glowing red hot in his room heater. What is it?

a)

Glower

b)

Just a coil of wire that became very hot

c)

Element

d)

A new kind of bulb

77.

If a positive terminal of one cell is connected to the negative terminal of the next cell it is known as

a)

Electric current

b)

Fuse

c)

Battery

d)

Element

78.

Which of these are features of electro magnet usually? Choose one or more options

a)

Temporary

b)

Strong

c)

Needs Electricity

d)

Weak

79.

A battery is a combination of

(a) only single cell

(b) only two cells

(c) two or more cells

(d) None of the above

a)

a

b)

b

c)

c

d)

d

80.

What is Voltage

a)

Which creates current

b)

which pushes current

c)

which resists current

d)

which is a break in circuit

81.

The heating coils/elements of different electrical appliances are usually made from ________ or ________ wires.

1. Copper 2. Aluminum 3. Nichrome 4. Tungsten

a)

1 & 2

b)

1 & 4

c)

2 & 4

d)

3 & 4

82.

How is electric potential measured

a)

Voltmeter

b)

Galvanometer

c)

Ammeter

d)

It cannot be measured= infinity

83.

Scientist (a)   was the first to notice the deflection of compass whenever current was passed through the wire near it. (Please answer in small letters)

84.

The coil of wire contained in an electric heater is known as

a)

component

b)

element

c)

circuit

d)

spring

85.

Who discovered the magnetic field of electric current?

a)

Hans Christin Oyster

b)

James Kristin Oersted

c)

Lans Christin Oestred

d)

Hans Christian Oersted

86.

LEDs full form is-

a)

Light Era Diode

b)

Light Etern Dot

c)

Light Emitting Dot

d)

Light Emitting Diode

87.

Where can the key or switch be placed in the circuit?

a)

The left side of the battery

b)

The right side of the battery

c)

Can be placed anywhere in the circuit

d)

Near the positive terminal of the bulb

88.

Which of the following devices usually can break a circuit - (Choose one or more options)

a)

Switches

b)

Fuses

c)

MCBs

d)

Miniature Circuit Breakers

89.

When electric current flows through the metal filament of the bulb it gets heated to very high temperature and becomes______ hot and start emitting _______.

a)

White, light

b)

Red, light

c)

White, heat

d)

Red, heat

90.

Wires made from some special materials melt quickly and break when a large electric current passes through it.these wires are used to make

a)

Fuses

b)

Electric fuses

c)

A&B

d)

Electromagnet

91.

Which of these is the symbol of a bulb?

a)
b)
c)
d)
92.

The magnitude of magnetism produced by an electric current in a wire depends upon- (a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases

a)

Both a, b

b)

Only a

c)

Only b

d)

None

93.

What is Electromagnet

(a)  

94.

Electromagnets could be used in particular devices

a)

TRUE

b)

FALSE

95.

Identify the symbol-

a)

Electric Bulb

b)

Electric Cell

c)

Battery

d)

Switch in ON position

e)

Switch in OFF position

96.

Connection of more than one device/ appliance to a single socket is called-

a)

Overloading

b)

Short circuit

c)

Both

97.

Identify the poles of the magnet in the given figure.

a)

NORTH

b)

SOUTH

c)

One is north and the other is south

d)

Can't predict

98.

When the switch is on the circuit from the positive to negative terminal is complete

a)

True

b)

False

99.

A fuse wire is a wire of-

a)

High resistivity and low melting point

b)

High resistivity and high melting point

c)

Low resistivity and low melting point

d)

Low resistivity and high melting point

100.

When current is switched 'on' of a bulb it converts _______ energy into _______ energy.

a)

Electrical, heat

b)

Electrical, light

c)

Electrical, mechanical

d)

Electrical, sound

101.

What is the full form of MCB-

a)

Massive Circuit Breaker

b)

Massive Circuit Body

c)

Mighty Circuit Breaker

d)

Miniature Circuit Breaker

102.

The amount of heat produced in a wire depends on

a)

material

b)

length

c)

thickness

d)

all of these

103.

Which mark is necessary on electric appliances?

a)

AGMARK

b)

ISI

c)

FICCI

d)

KSK

104.

The device used to make or break an electric circuit is

a)

Resistor

b)

Battery

c)

Switch

d)

Ammeter

105.

A common household device, that do not use an electromagnet in its working, is-

a)

The electric bell

b)

Geyser

c)

Telephone

d)

Loud speaker

106.

Electric Bell works on the principle of-

a)

Magnetism

b)

Electromagnetism

c)

Gravitation

d)

Static Electricity

107.

Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire?

a)

A

b)

B

c)

C

d)

D

108.

When current is switched on in an electric bell, it converts _______ energy into _______ energy.

a)

Electrical, light

b)

Electrical, sound

c)

Electrical, heat

d)

Mechanical, sound

109.

A device used to measure the amount of electric current flowing through a circuit.

a)

Ammeter

b)

Voltmeter

c)

Resistor

d)

Battery

110.

When does an electromagnet lose its magnetic Property?

a)

When current is very high

b)

When its switched off

c)

When heat is very high

d)

When current is switched on

111.

Current flows through the circuit when the circuit is in the _________________condition.

a)

Broken

b)

Open

c)

Closed

d)

Incomplete

112.

Who was the first to observe the magnetic effect of electric current?

a)

Faraday

b)

Oersted

c)

Volta

d)

Ampere

113.

A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then

a)

The wire will experience a force along the direction of the magnetic field

b)

The wire will not experience any force

c)

The wire will experience the torque

d)

The wire will experience a perpendicular force

114.

A fuse wire is made up of alloy

a)

Nichrome

b)

Tin-lead

c)

Manganin

d)

Constantan

115.

An Electric charge in a uniform motion produces

a)

An Electric Field only

b)

An Magnetic field only

c)

Both Electric Field & Magnetic field

d)

Neither of them

116.

The magnetic field around a current carrying coil

a)

Lasts for three hours

b)

Lasts as long as current flows through it

c)

Lasts till its half-life period

d)

Is permanent

117.

Copper wires are used as connecting wires because

a)

Copper has very high melting point

b)

Copper wires are very thick wires

c)

Copper wires offer a lower resistance

d)

None of these

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