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

The SI unit of magnetic induction is

Question # 2

Motional emf is called motional:

Question # 3

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

Question # 4

For inducting emf in a coil the basic requirement is that:

Question # 5

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

Question # 6

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

Question # 7

Eddy current is produced when:

Question # 8

Transformer is used to

Question # 9

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 # 10

Back emf is produced due to

Question # 11

When the conductor moved across a magnetic field:

Question # 12

An induced current can be produced by

Question # 13

The phenomenon of generation of induced emf is called

Question # 14

An emf is set up in a conductor when it:

Question # 15

Self inducede e.m.f. is also called

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 The rate change of area expressed is expressed in:
A. None of these
B. ms-1
C. m2s-2
D. ms-2
3 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
4 When a conductor is moved across a magnetic field, the redistribution of charge sets up:
A. Magnetic field
B. Electrostatic field
C. Electromagnetic field
D. All of these
5 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
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 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
8 A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
A. The coil is destroyed
B. The coil is Rotated
C. The coil is neither destroyed nor rotated
D. Both (A) and (B)
9 The practical application of the phenomenon of Mutual induction is
A. Transformers
B. Generator
C. Motor
D. All of these
10 Split rings act as
A. Vibrator
B. Resistor
C. Motor
D. Commulator

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