ECAT Pre Computer Science Chapter 15 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 15 Electromagnetic Induction

Try The MCQ's Test For ECAT Physics Chapter 15 Electromagnetic Induction

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ECAT Physics Chapter 15 Electromagnetic Induction

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Question # 1

Back emf is produced due to

Question # 2

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?

Question # 3

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

Question # 4

Faraday's law of electromagnetic induction has been used in the construction of:

Question # 5

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

Question # 6

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

Question # 7

The rate change of area expressed is expressed in:

Question # 8

An emf is set up in a conductor when it

Question # 9

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

Question # 10

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

Question # 11

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

Question # 12

Lenz's law is the consequence of

Question # 13

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

Question # 14

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

Question # 15

When a conductoris moved across a magnetic field:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The phenomenon of generation of induced emf is called:
A. Electrostatic induced
B. Magnetic induced
C. Electromagnetic induced
D. Electric induced
2 The motional e.m.f depends upon the
A. Length of a conductor
B. Strength of a magnet
C. Speed of the conductor
D. All of the above
3 The law of electromagnetic induction is related to:
A. Coulomb
B. Ampere
C. Faraday
D. Lenz
4 The induced current in the loop can be increased by:
A. Using a strong magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All of above
5 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
6 Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:
A. 45 V
B. 15 V
C. 90 V
D. 300 V
7 The rate change of area expressed is expressed in:
A. None of these
B. ms-1
C. m2s-2
D. ms-2
8 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
9 The induced current is 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)
10 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
C. Relative motion of the loop and magnet
D. Any one of above

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