ECAT Pre Engineering Physics Chapter 15 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction

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Question # 1

An emf is set up in a conductor when it:

Question # 2

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

Question # 3

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 # 4

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

Question # 5

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

Question # 6

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:

Question # 7

When a conductoris moved across a magnetic field:

Question # 8

An induced current can be produced by

Question # 9

The phenomenon of generation of induced emf is called

Question # 10

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

Question # 11

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

Question # 12

Self inducede e.m.f. is also called

Question # 13

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

Question # 14

The induced current in a conductor depends upon:

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 An induced current can be produced by:
A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic field
D. Constant electric field
2 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
3 The rate change of area expressed is expressed in:
A. None of these
B. ms-1
C. m2s-2
D. ms-2
4 Motional emf is called motional:
A. Electromagnetic force and is measured in newtons
B. Electromotive force and is measured in volt
C. Electromotive force and is measured in newtons
D. Electromagnetic force and is measured in volts
5 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
6 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
7 When the conductor moved across a magnetic field:
A. Emf induced is similar to that of a battery

B. Emf induced gives rise to induced current

C. An emf induced across its ends

D. All are correct
8 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
9 When there is no relative motion between the magnet and coil, the galvanometer indicated
A. No current in the circuit
B. An increasing current
C. A decreasing current
D. A constant current
10 Lenz's law is the consequence of
A. Mass
B. Energy conservation
C. Momentum conservation
D. Charge

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