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

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

Question # 2

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 # 3

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

Question # 4

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

Question # 5

When a conductoris moved across a magnetic field:

Question # 6

An induced current can be produced by

Question # 7

The phenomenon of generation of induced emf is called

Question # 8

The induced current is a conductor depends upon:

Question # 9

The SI unit of magnetic induction is

Question # 10

The rate change of area expressed is expressed in:

Question # 11

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

Question # 12

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

Question # 13

The induced current in the loop can be increased by:

Question # 14

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 # 15

The law of electromagnetic induction is related to:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 Which of the following is most suitable as the core of transformer
A. Soft iron
B. Alinco
C. Steel
D. None of these
5 The induced emf in a coil is proportional to:
A. Magnetic flux through a coil
B. Rate of change of magnetic flux through the coil
C. Area of the coil
D. Product of magnetic flux and area of the coil
6 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
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 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
9 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
10 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

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