Question # 1

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

Choose an answer

Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

Lenz's law is the consequence of

Choose an answer

Mass

Energy conservation

Momentum conservation

Charge

The Phenomenon of generation of induced emf is called

Choose an answer

Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both A and B

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

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

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

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

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

Back emf is produced due to

Choose an answer

Self induction

Mutual induction

A.C

Lenz's law

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

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

Lens's law deals with the

Choose an answer

Magnitude of induced current

Magnitude of induced e.m.f

Direction of induced e.m.f

Direction of induced current

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

Choose an answer

At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

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

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

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

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

Choose an answer

Flux should link the coil

Change in flux should link the coil

Coil should form a closed loop

Both B and C are true

The SI unit of magnetic induction is

Choose an answer

Weber

Weber/meter

Henry

Tesla

More Classes

Other Links

Physics ECAT Pre Engineering 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