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CH03 SSLC PHYSICS 2022

Total questions: 51

Worksheet time: 45mins

Name
Class
Date
1.
In 1831 who discovered electromagnetic induction?
a)
Thomas Edison
b)
Nikola Tesla
c)
Michael Faraday
2.
Passing a current through a solenoid will produce
a)
a magnetic field
b)
an electric field
c)
a current field
d)
nothing is produced
3.
 Faraday's Law states that the induced emf is proportional to Hide answers
a)
the current 
b)
the cross sectional area of the coil 
c)
the rate of change in the flux of the coil
4.
13.7 Based on this picture, which side will have a higher voltage?
a)
Secondary
b)
Primary
c)
Both sides have the same voltage
d)
Cannot be determined
5.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
6.
Electromagnetic induction is change in ___________________. 
a)
surface area
b)
magnetic poles
c)
magnetic flux
7.
A magnet can move in a coil of wire to produce electricity in which system?
a)
Generator
b)
Motor
c)
Magnet
d)
Transformer
8.

What happens to the galvanometer if the copper rod is moved upwards?

a)

No change

b)

Deflect to the right

c)

Deflect to the left

d)

Deflect to the right and left

9.

Which action will increase the deflection of the galvanometer pointer?

a)

The magnetic pole is reversed

b)

The number of turns of coils is increased

c)

The coil is made from insulated wire

d)

The magnet is slowly pushed into the coil

10.
Electromagnetic induction is taking place in this experiment. How much electricity is being produced?
a)
-10 Volts
b)
10 Volts
c)
100 Volts
d)
This question cannot be answered based on this image
11.
How could the experimenter increase the amount of electricity being induced by this experiment?
a)
Increase the number of coils
b)
Decrease the number of coils
c)
Flip the magnet around
d)
Nothing, the amount of electricity cannot be increased
12.

When a conductor is moved to cut through the magnetic flux, an _______________ is produced.

a)

induced current

b)

electromotive force

c)

electromagnetic induction

d)

internal resistance

13.

The production of electric current by a changing magnetic field is called ____________________________________.

a)

induced current

b)

electromotive force

c)

electromagnetic induction

d)

internal resistance

14.

___________________rule can be used to determine the direction of the ___________ induced current produced.

a)

Fleming's Left Hand Rule

b)

Fleming's Right Hand Rule

c)

Right Hand Grip Rule

15.

In Fleming's Right Hand Rule, First finger and center finger represent

a)

current, magnetic field

b)

magnetic field, current

c)

force, current

d)

magnetic field, force

16.

The d.c generator and a.c generator make use of electromagnetic induction to produce _______________________

a)

force

b)

electricity

c)

energy

d)

power

17.

Which device uses slip rings?

a)

a cathode-ray tube

b)

a d.c. generator

c)

an a.c. generator

d)

a solenoid

18.
How would flipping the magnet in this experiment change the current?
a)
The current would not change
b)
The current would go to the right
c)
There would be no current
d)
The current would go CRAZY
19.
___ Law defines the magnetic field generated by a long straight wire
a)
Lenz'
b)
Faraday's
c)
Ampere's
20.
The process of generating the current in a conductor is called as 
a)
Electro motive force 
b)
Electromagnetic induction 
c)
generator energy conversion 
d)
induced voltage
21.

In order for electromagnetic induction to occur, you need...

a)

a conductor

b)

a magnetic field

c)

relative motion

d)

all three

22.

A coil is rotated steadily between the poles of a magnet. The coil is connected to an oscilloscope.


Which graph shows the output voltage V against time t?

a)
b)
c)
d)
23.

Which diagram represents the voltage output of a simple a.c. generator?

a)
b)
c)
d)
24.

If the coil is placed perpendicular to field lines then the number of lines passing through the coil is:

a)

Minimum

b)

Maximum

c)

Zero

d)

May be maximum or minimum

25.

AC generator converts:

a)

Mechanical energy to electrical energy

b)

Electrical energy to mechanical energy

c)

Heat energy to mechanical energy

d)

Chemical energy to electrical energy

26.

What is true of AC GENERATOR?

a)

It works on the principle of electromagnetic induction

b)

The mechanical energy of the rotation is converted into electrical energy

c)

A pair of slip rings are used in the AC generator

d)

All the above

27.

The electricity generated from the power plant is ……

a)

Alternating Current

b)

Direct Current

c)

Delayed Current

d)

Eddy Current

28.

If a transformer reduces voltage, it is called a....................... transformer.

a)

step left

b)

step right

c)

step up

d)

step down

29.

If a transformer increases voltage, it is called a ......... transformer.

a)

step right

b)

step left

c)

step up

d)

step down

30.

The winding of wire around a core which is connected to a source of energy is called the ....... coil.

a)

primary

b)

secondary

c)

tertiary

31.

Calculate potential difference in the secondary coil based on the information given below.


Vp = 240 V

Np = 20

Ns = 125

Vs ?

a)

1500

b)

500

c)

1000

d)

2000

32.

Which of the following is an example of appliance using alternating power source?

a)
b)
c)
d)
33.

Why transformers work with A.C. current but not D.C.

a)

A.C current produces changing magnetic field.

b)

D.C current produces changing magnetic field.

c)

D.C current is weak

d)

A.C current is powerful

34.

This picture is an example of a ________________.

a)

Motor

b)

Generator

c)

Step-up transformer

d)

Step-down transformer

35.

A transformer has 100 turns in the primary coil and 25 turns in the secondary coil. When a 120 V is applied to the primary coil, what is the voltage in the secondary coil?

a)

480V

b)

30V

c)

20V

d)

450V

36.

Why transformers work with A.C. current but not D.C.

a)

A.C current produces changing magnetic field.

b)

D.C current produces changing magnetic field.

c)

D.C current is weak

d)

A.C current is powerful

37.
CHOOSE ONE OF THE FACTOR EFFECTING INDUCTOR________________
a)
COIL LENGTH
b)
COIL AREA
c)
NO.OF TURNS
d)
ALL OF THE ABOVE
38.
Identify the electronic symbol.
a)
inductor
b)
wire
c)
transformer
d)
None of the Above
39.

The current induced in a second piece of wire develops it's own magnetic field which in turn will induce a current in the original wire of reverse polarity. What is this called?

a)

Opposite/opposing reactance

b)

Counter/Back EMF

c)

Mirror Effect

d)

Magic

40.

Mutual inductance is NOT dependant on which of the following:

a)

number of turns

b)

physical size of each coil

c)

Position of coils

d)

thickness of wire

41.

Inductors...

a)

oppose change

b)

like change

42.

What is the name of the equipment used to produce electricity in power stations?

a)

transformer

b)

furnace

c)

generator

d)

turbine

43.

Electricity is generated at a .......

a)

power station

b)

petrol station

c)

power source

d)

source of energy

44.

_______ carries electric current to an electrical appliances.

a)

Neutral wire

b)

Live wire

c)

Earth wire

45.

_______ returns electric current to the branch substation.

a)

Neutral wire

b)

Live wire

c)

Earth wire

46.

___________ disconnects the current supply temporarily when it is not needed (such as during repairing damaged wiring).

a)

ELCB circuit breaker

b)

MCB circuit breaker

c)

Main switch

d)

Electric meter

47.

___________ measures the electrical energy that is used in the house.

a)

ELCB circuit breaker

b)

MCB circuit breaker

c)

Main switch

d)

Electric meter

48.

What is the colour of earth wire?

a)

Brown

b)

Red

c)

green

d)

Blue

49.

The main supply of electrical energy in a house has a voltage of

a)

33 kV

b)

415 V

c)

240 V

50.

There are two types of fuse. The wire of _____________ cannot be replaced when melted. A new fuse need to be replaced instead.

a)

Replaceable fuse

b)

Irreplaceable fuse

c)

Cartridge fuse

51.

Choose the safety components found in wiring system at home.

a)

Electric meter

b)

ELCB circuit breker

c)

MCB circuit breaker

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