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

An induced current can be produced by:

Question # 2

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

Question # 3

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

Question # 4

Micheal Faraday and joseph Henry belong respectively to:

Question # 5

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

Question # 6

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

Question # 7

In magnet-coil experiment, emf can be produced by

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

The SI unit of magnetic induction is

Question # 12


The magnitude of induced emf depends upon the:

Question # 13

The device in which induced emf is statically induced emf is:

Question # 14

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

Question # 15

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

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ECAT Physics Chapter 15 Important MCQ's

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 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
3 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
4 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
5 The phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
6 The induced current in the loop can be increased by:
A. Using a stronger magnetic field
B. Moving the loop faster
C. Replacing the loop by a coil of many turns
D. All above
7 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:
A. Motion emf
B. Electrostatic emf
C. Induced emf
D. Both A and B
8 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:
A. Also 20º

B. 70º

C. 90º

D. 180º
9 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
10 Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current
A. Of same magnitude in the same direction
B. Of different magnitude in the same direction
C. Of same magnitude but in opposite direction
D. Of different magnitude in the opposite direction

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