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

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

Question # 2

An induced current can be produced by:

Question # 3

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

Question # 4

The motional e.m.f depends upon the

Question # 5

An emf is set up in a conductor when it:

Question # 6

Lenz's law is the consequence of

Question # 7

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

Question # 8

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

Question # 9

Eddy current is produced when:

Question # 10

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

Question # 11

The induced current in the loop can be increased by:

Question # 12

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 # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
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:
A. Zero
B. Of smaller magnitude
C. Of larger magnitude
D. Sometimes B, sometimes C
3 Eddy current is produced when:
A. A metal is kept in varying magnetic field
B. A metal is kept in steady magnetic field
C. A circular coil is placed in a steady magnetic field
D. A current is passed through a circular coil
4 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
5 Which of the following quantities remain constant in step up transformer?
A. Current
B. Voltage
C. Power
D. Heat
6 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:
A. 0.25 N
B. 0.25 V
C. 2.5 V
D. 2.5 N
7
The magnitude of induced emf depends upon the:
A. Rate of decrease of magnetic field
B. Rate of change of magnetic field
C. Rate of increase of magnetic flux
D. Constancy of magnetic field
8 The current produced by moving a loop of wire across a magnetic field is called
A. Direct current
B. Magnetic current
C. Alternating current
D. Induced current
9 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
10 Michael Faraday and Joseph Henry belong respectively to
A. USA and England
B. England and France
C. England and USA
D. USA and France

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