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 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:

Question # 2

In magnet-coil experiment, emf can be produced by

Question # 3

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

Question # 4

Lens's law deals with the

Question # 5

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

Question # 6

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

Question # 7

Which of the following is most suitable as the core of transformer

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Split rings act as

Question # 13

Motional emf is called motional:

Question # 14

A.C. can be measure with the help of

Question # 15

The practical application of the phenomenon of Mutual induction is

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 Self inducede e.m.f. is also called
A. Motional e.m.f.
B. Thermistor
C. Electrostatic induction
D. Back e.m.f
3 Split rings act as
A. Vibrator
B. Resistor
C. Motor
D. Commulator
4 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
5 The rate change of area expressed is expressed in:
A. None of these
B. ms-1
C. m2s-2
D. ms-2
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:
A. 0.2 henry
B. 0.1 henry
C. 0.8 henry
D. 0.04 henry
7 When a conductoris moved across a magnetic field:
A. Emf induced its similar to that of a battery
B. Emf induced gives rise to induced current
C. An emf is induced across its ends
D. All are correct
8 A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:
A. The coil is distorted
B. The coil is rotated
C. The coil is neither distorted nor rotated
D. Both A and B
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 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

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