Question # 1

The unit of induced emf is:

Choose an answer

Volt

Nm/As

Joule coul^-1

Both A and C

All of these

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

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

When switch is kept closed

None of these

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

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

With the help of rheostat

All of these

None of these

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

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

When switch is kept closed

None of these

Self inducede e.m.f. is also called

Choose an answer

Motional e.m.f.

Thermistor

Electrostatic induction

Back e.m.f

In magnet-coil experiment, emf can be produced by

Choose an answer

Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

The magnitude of induced emf depends upon the:

Choose an answer

Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

An induced current can be produced by:

Choose an answer

Constant magnetic field

Changing magnetic field

Varying magnetic feild

Constant electric field

None of these

The Phenomenon of generation of induced emf is called

Choose an answer

Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both A and B

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

Choose an answer

Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving the coil

Relative motion of the loop and magnet

Any one of above

All above

Michael Faraday and Joseph Henry belong respectively to

Choose an answer

USA and England

England and France

England and USA

USA and France

None of these

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?

Choose an answer

2 H

3 H

1/2 H

Zero

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

Choose an answer

Transformer

AC generator

Alternator

Dynamo

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

Choose an answer

Motion emf

Electrostatic emf

Induced emf

Both A and B

Both A and C

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

Choose an answer

Of same magnitude in the same direction

Of different magnitude in the same direction

Of same magnitude but in opposite direction

Of different magnitude in the opposite direction

None of these

Transformer is used to

Choose an answer

Increase alternating current

Increase d.c voltage

Increase & Decrease emf

All answers are right

More Classes

Other Links

ECAT Physics Chapter 15 Electromagnetic Induction Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer