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

Question # 2

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

Question # 3

Self inducede e.m.f. is also called

Question # 4

The practical application of the phenomenon of Mutual induction is

Question # 5

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

Question # 6

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 # 7

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

Question # 8

The direction of induced current is always so as to oppose the cause which produces it. This is

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

The unit of induced emf is:

Question # 11

An emf is set up in a conductor when it:

Question # 12

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

Question # 13

Michael Faraday and Joseph Henry belong respectively to

Question # 14

The phenomenon of generation of induced emf is called:

Question # 15

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

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ECAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:
A. Zero
B. Of smaller magnitude
C. Of larger magnitude
D. Sometimes B, sometimes C
2 Faraday's law of electromagnetic induction has been used in the construction of:
A. Galvanometer
B. Voltmeter
C. Electric motor
D. Electric genrator
3 The induced current in 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
4 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
5 The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called
A. Mutual induction
B. Mutual inductance
C. Capacitance
D. Self inductance
6 The work is stored in the inductor as
A. Electric potential energy
B. Elastic potential energy
C. Magnetic energy
D. Absolute potential energy
7 Micheal Faraday and joseph Henry belong respectively to:
A. USA and England
B. England and France
C. England and USA
D. USA and France
8 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
9 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?
A. 2 H
B. 3 H
C. 1/2 H
D. Zero
10 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

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