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

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

Question # 2

Motional emf is called motional:

Question # 3

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 # 4

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

Question # 5

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

Question # 6

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

Question # 7

A.C. can be measure with the help of

Question # 8

The induced current in the loop can be increased by:

Question # 9

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

Question # 10

Transformer is used to

Question # 11

An emf is set up in a conductor when it

Question # 12

In magnet-coil experiment, emf can be produced by

Question # 13

An induced current can be produced by:

Question # 14

The induced current in a conductor depends upon:

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 Lenz's law is the consequence of
A. Mass
B. Energy conservation
C. Momentum conservation
D. Charge
2 For inducting emf in a coil the basic requirement is that:
A. Flux should link the coil
B. Change in flux should link the coil
C. Coil should form a closed loop
D. Both B and C are true
3 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
4 An emf is set up in a conductor when it:
A. is kept in a magnetic field
B. is kept in a electric field
C. Move across a magnetic field
D. Both (A) and (B)
5 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
6 Referring to above figure, current in the coil P grows from zero to its maximum value
A. At the instant the switch is closed
B. At the instant the switch is opened
C. When switch is kept open
D. All of above
7 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
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 an induced current is coil S
D. All of these
9 Referring to above figure, a changing current in coil P can be produced:
A. At the instant the switch is closed
B. At the instant the switch is opened
C. With the help of rheostat
D. All of these
10 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law

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