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

Question # 1

The induced current in the loop can be Increased by

Using a stronger magnetic field A
Moving the loop faster B
Replacing the loop by a coil of many turns C
All above D
Both A and B E

Question # 2

Michael 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 # 3

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 # 4

The change of magnetic flux through a circuit will produce

Magnetic Field A
Electric Field B
emf C
a.c D

Question # 5

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

Transformer A
Generator B
Motor C
All of these D

Question # 6

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 # 7

Referring to above figure, a changing current in coil P can be produced:

At the instant the switch is closed A
At the instant the switch is opened B
With the help of rheostat C
All of these D
None of these E

Question # 8

The SI unit of magnetic induction is

Weber A
Weber/meter B
Henry C
Tesla D

Question # 9

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 # 10

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

Question # 11

When a conductor moved with its length parallel to the lines of magnetic fled:

An emf is induced across its ends A
Emf induced is similar to that of a battery B
Emf passes through the conductor C
Both A and B D
None of these E

Question # 12

Which of the following quantities remain constant in step up transformer?

Current A
Voltage B
Power C
Heat D

Question # 13

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 # 14

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 # 15

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

Both A and C A
Induced emf B
Both A and B C
Motion emf D
Electrostatic emf E

Question # 16

When there is no relative motion between the magnet and coil, the galvanometer indicated

No current in the circuit A
An increasing current B
A decreasing current C
A constant current D
Either B or C E

Question # 17

The direction of induced current is always so as to oppose the cause which produces it. This is

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

Question # 18

An induced current can be produced by:

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

Question # 19

The product of induced current and the resistance of the wire through which the current is passing is called:

Electromagnetic induction A
induced emf B
Induced current C
Self induced D
None of these E

Question # 20

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 # 21

A.C. can be measure with the help of

Nuclear effect A
Magnetic effect B
Chemical effect C
Heating effect D

Question # 22

Eddy current is produced when:

A metal is kept in varying magnetic field A
A metal is kept in steady magnetic field B
A circular coil is placed in a steady magnetic field C
A current is passed through a circular coil D

Question # 23

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 # 24

The practical application of the phenomenon of Mutual induction is

Transformers A
Generator B
Motor C
All of these D

Question # 25

The law of electromagnetic induction is related to:

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

Question # 26

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 # 27

When there is no relative motion between the magnet and coil, the galvanometer indicates:

No current in circuit A
An increasing current B
A decreasing current C
Either B or C D

Question # 28

When the conductor moved across a magnetic field:

Emf induced is similar to that of a battery
A
Emf induced gives rise to induced current
B
An emf induced across its ends
C
All are correct
D
None of these
E

Question # 29

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 # 30

In magnet-coil experiment, emf can be produced by:

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

Sr.#	Question	Answer
1	In magnet-coil experiment, emf can be produced by:	A. Keeping the coil stationary and moving the magnet B. Keeping the magnet stationary and moving the coil C. Relative motion of the loop and magnet D. Any one of above
2	Lens's law deals with the	A. Magnitude of induced current B. Magnitude of induced e.m.f C. Direction of induced e.m.f D. Direction of induced current
3	Split rings act as	A. Vibrator B. Resistor C. Motor D. Commulator
4	The induced current in a conductor depends upon	A. Resistance of the loop B. Speed with which the conductor moves C. Any of these D. Both A and B
5	In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:	A. 0.2 henry B. 0.1 henry C. 0.8 henry D. 0.04 henry
6	Referring to above figure, due to change in current in the coil P, the change in magnetic flux:	A. Is associated with coil P B. Is associated with coil S C. Causes an induced current is coil S D. All of these
7	The product of induced current and the resistance of the wire through which the current is passing is called:	A. Electromagnetic induction B. induced emf C. Induced current D. Self induced
8	Referring to above figure, due to change in current in the coil P, the change in magnetic flux	A. Is associated with coil P B. Is associated with coil S C. Causes and induced current in coil S D. All of these
9	Referring to above figure, current in coil P falls from its maximum value to zero:	A. At the instant the switch is closed B. At the instant the switch is opened C. When switch is kept open D. When switch is kept closed
10	An induced current can be produced by:	A. Constant magnetic field B. Changing magnetic field C. Varying magnetic field D. Constant electric field

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ECAT Pre General Science Physics Chapter 15 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction