ECAT Pre General Science Chapter 15 online mcq test with answers for Physics chapter 15 (Electromagnetic Induction)

Question # 1

An induced current can be produced by

Constant magnetic field A
Changing magnetic field B
Varying electric field C
Constant electric field D
None of these E

Question # 2

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

Mutual induction A
Mutual inductance B
Capacitance C
Self inductance D

Question # 3

The phenomenon of generation of induced emf is called:

Electrostatic induced A
Magnetic induced B
Electromagnetic induced C
Electric induced D
Both A and C E

Question # 4

For inducting emf in a coil the basic requirement is that:

Flux should link the coil A
Change in flux should link the coil B
Coil should form a closed loop C
Both B and C are true D

Question # 5

In magnet-coil experiment, emf can be produced by

Keeping the coil stationary and moving the magnet A
Keeping the magnet stationary and moving B
Relative motion of the loop and magnet C
Any one of above D
All above E

Question # 6

A device which converts Electrical energy into mechanical energy is called as

Transformer A
Generator B
Motor C
All of these D

Question # 7

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:

Of same magnitude in the same direction A
Of different magnitude in the same direction B
Of same magnitude but in opposite direction C
Of different magnitude in the opposite direction D
None of these E

Question # 8

Transformer is used to

Increase alternating current A
Increase d.c voltage B
Increase & Decrease emf C
All answers are right D

Question # 9

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

Magnetic field A
Electrostatic field B
Electromagnetic field C
All of these D
None of these E

Question # 10

The current produced by moving a loop of wire across a magnetic field is called:

Direct current A
Magnetic current B
Alternating current C
Induced current D
None of these E

Question # 11

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10^-2Wb, and change in current is 0.01 A?

2 H A
3 H B
1/2 H C
Zero D

Question # 12

The magnitude of induced emf depends upon the:

Rate of decrease of magnetic field A
Rate of change of magnetic field B
Rate of increase of magnetic flux C
Constancy of magnetic field D
None of these E

Question # 13

Micheal Faraday and joseph Henry belong respectively to:

USA and England A
England and France B
England and USA C
USA and France D
None of these E

Question # 14

Split rings act as

Vibrator A
Resistor B
Motor C
Commulator D

Question # 15

Referring to above figure, current in coil P falls from its maximum value to zero:

At the instant the switch is closed A
At the instant the switch is opened B
When switch is kept open C
When switch is kept closed D
None of these E

Question # 16

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

Is associated with coil P A
Is associated with coil S B
Causes an induced current is coil S C
All of these D
None of these E

Question # 17

The induced current is a conductor depends upon:

Resistance of the loop A
Speed with which the conductor moves B
Any of these C
Both (A) and (B) D
None of these E

Question # 18

The law of electromagnetic induction is related to:

Coulomb A
Ampere B
Faraday C
Lenz D
None of these E

Question # 19

Referring to above figure, current in coil P falls from its maximum value to zero

At the instant the switch is closed A
At the instant the switch is opened B
When switch is kept open C
When switch is kept closed D
None of these E

Question # 20

The induced current in a conductor depends upon

Resistance of the loop A
Speed with which the conductor moves B
Any of these C
Both A and B D
None of these E

Question # 21

The current produced by moving a loop of wire across a magnetic field is called

Direct current A
Magnetic current B
Alternating current C
Induced current D
None of these E

Question # 22

The SI unit of magnetic induction is

Weber A
Weber/meter B
Henry C
Tesla D

Question # 23

The rate change of area expressed is expressed in:

None of these A
ms^-1 B
m²s^-2 C
ms^-2 D
m²s^-1 E

Question # 24

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

Is associated with coil P A
Is associated with coil S B
Causes and induced current in coil S C
All of these D
None of these E

Question # 25

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current

Of same magnitude in the same direction A
Of different magnitude in the same direction B
Of same magnitude but in opposite direction C
Of different magnitude in the opposite direction D
None of these E

Question # 26

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when

The coil is distorted A
The coil is rotated B
The coil is neither distorted nor rotated C
Both A and B D
None of these E

Question # 27

An emf is set up in a conductor when it:

is kept in a magnetic field A
is kept in a electric field B
Move across a magnetic field C
Both (A) and (B) D
None of these E

Question # 28

Referring to above figure, current in the coil P grows from zero to its maximum value

At the instant the switch is closed A
At the instant the switch is opened B
When switch is kept open C
All of above D
Neither of above E

Question # 29

An induced current can be produced by:

Constant magnetic field A
Changing magnetic field B
Varying magnetic feild C
Constant electric field D
None of these E

Question # 30

A metal road of length 1m is moving at a speed of 1 ms^-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:

0.25 N A
0.25 V B
2.5 V C
2.5 N D
25 V E

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ECAT Pre General Science Physics Chapter 15 MCQ Test With Answer for Physics chapter 15 (Electromagnetic Induction)

ECAT Pre General Science Physics Chapter 15 Test

ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction Online Test