Question # 1

If we make magnetic field stronger the value of induced current is.

Choose an answer

Decreased

Increased

Vanishes

Remain constant

Energy density of an inductor is:

Choose an answer

UM=1/2μ_∘/B²

Um = 2μ_∘/B

UM = 1/2B²/μ_∘

Um = 2B²/μ_∘

In case of inductor , energy is stored in the

Choose an answer

Electric field

Magnetic field

Potential field

Gravitational field

Electric current produces magnetic field, was suggested by.

Choose an answer

Faraday

Oersted

Henry

Lenz

The motional emf depends upon the

Choose an answer

Length of conductor

Speed of conductor

Strength of magnet

All of these

The working principle of transformer is.

Choose an answer

Self induction

Faraday's law

Mutual induction

Electromagnetic induction

A current generator device converts:

Choose an answer

Mechanical energy into chemical energy

Chemical energy into electrical energy

Mechanical energy into electrical energy

Both b and c

The jerks in D.C. motor are created by the use of.

Choose an answer

Armature

Commutators

Split rings

Source of emf

The application of mutual induction is a.

Choose an answer

D.C. motor

Radio

Television

Transformer

Which of the following quantities remain constant in step up transformer?

Choose an answer

Current

Voltage

Power

Heat

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

Choose an answer

Flux density

Electric flux

Magnetic flux

Magnetic field strength

Lenz's law presented in

Choose an answer

1834

1934

1826

1836

The magnitude of back emf:

Choose an answer

Increases with sped of motor

Decreases with speed of motor

Remains same

None of above

Energy stored in an inductor is:

Choose an answer

1/2L²I

1/2L²/I

_1/2LI²

1/2LI

Choose an answer

In self induction A coil is connected in__________ with battery and a rheostat.

Choose an answer

Parallel

Series

Both A and B

None of above

If speed of rotation of a generator is doubled the output voltage will be.

Choose an answer

Remain same

Double

Four time

One half

More Classes

Other Links

Physics ICS Part 2 Chapter 15 Online MCQ's 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

Choose an answer