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

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 # 2

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

Question # 3

The phenomenon of generation of induced emf is called

Question # 4

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

Question # 5

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

Question # 6

Micheal Faraday and joseph Henry belong respectively to:

Question # 7

Lenz's law is the consequence of

Question # 8

The induced current in the loop can be increased by:

Question # 9

Self inducede e.m.f. is also called

Question # 10

The rate change of area expressed is expressed in:

Question # 11

The SI unit of magnetic induction is

Question # 12

Referring to above figure, a changing current in coil P can be produced:

Question # 13

A.C. can be measure with the help of

Question # 14

An induced current can be produced by

Question # 15

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:

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 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
2 An emf is set up in a conductor when it:
A. Is kept in a magnetic field
B. Is kept in an electric field
C. Moves across a magnetic field
D. Both A and B
3 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
4 Which of the following quantities remain constant in step up transformer?
A. Current
B. Voltage
C. Power
D. Heat
5 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
6 Split rings act as
A. Vibrator
B. Resistor
C. Motor
D. Commulator
7 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
8 Transformer is used to
A. Increase alternating current
B. Increase d.c voltage
C. Increase & Decrease emf
D. All answers are right
9 The phenomenon of generation of induced emf is called
A. Electrostatic induction
B. Magnetic induction
C. Electromagnetic induction
D. Electric induction
10 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

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