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

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 2

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

Question # 3

The change of magnetic flux through a circuit will produce

Question # 4

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 # 5

Back emf is produced due to

Question # 6

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

Question # 7

The magnitude of induced emf depends upon the

Question # 8

The rate change of area expressed is expressed in:

Question # 9

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

Question # 10

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

Question # 11

The product of induced current and the resistance of the wire through which the current is passing is called:

Question # 12

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

Question # 13

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

Question # 14

In magnet-coil experiment, emf can be produced by:

Question # 15

The phenomenon of generation of induced emf is called

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic induction is
A. Weber
B. Weber/meter
C. Henry
D. Tesla
2 The magnitude of induced emf depends upon the:
A. Rate of decrease of magnetic field
B. Rate of change of magnetic field
C. Rate of increase of magnetic flux
D. Constancy of magnetic field
3 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
4 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
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 The phenomenon of generation of induced emf is called:
A. Electrostatic induced
B. Magnetic induced
C. Electromagnetic induced
D. Electric induced
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 An induced current can be produced by
A. Constant magnetic field
B. Changing magnetic field
C. Varying electric field
D. Constant electric field
9 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
10 Back emf is produced due to
A. Self induction
B. Mutual induction
C. A.C
D. Lenz's law

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