Question # 1

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

Choose an answer

Remain same

Double

Four time

One half

The induction can be increased by winding the wire around a core made of.

Choose an answer

Copper

Silicon

Iron

Aluminum

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

Choose an answer

45 V

15 V

90 V

300 V

Mutual induction play role in.

Choose an answer

Generator

D.C. motor

Galvanometer

Transformer

A step up transformer is used 120 V line to provide 240 V. If primary coil has 100 turns the number of turns is secondary is.

Choose an answer

50

100

150

200

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

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

Choose an answer

Current

Voltage

Power

Heat

If magnetic field is doubled then magnetic energy density becomes.

Choose an answer

Four times

Two times

Three times

Six times

The working principle of transformer is.

Choose an answer

Self induction

Faraday's law

Mutual induction

Electromagnetic induction

The direction of induced current is always so as to oppose the change which causes the current, this is the statement of

Choose an answer

Lenz's law

Faraday's law

Ampere's law

Coulomb's law

The negative sign with induced emf in Faraday's law is in accordance with

Choose an answer

Lenz's law

Amperes law

Boyle's law

Gauss law

Unit of self inductance is

Choose an answer

Weber

Tesla

Henry

Farad

split rings are used in

Choose an answer

A.C. generator

A.C. motor

Transformer

D.C. motor

The unit of induced emf is

Choose an answer

Ampere

Volt

Joule/coulomb

Both (b) and (c)

Lenz's law was given by Heinrich lenz in:

Choose an answer

1894

1904

1854

1834

When back emf in motor is zero, it draws.

Choose an answer

Zero current

Minimum current

Maximum current

Steady current

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

Choose an answer

Transforms

AC generator

Alevator

Dynamo

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

Choose an answer

0.1 J

10 J

100 J

1000 J

The device in the circuit that consume electrical energy are known as.

Choose an answer

Dissipaters

Generator

Load

Motors

One henry is equal to

Choose an answer

1 ohm x 1 sec

1 ohm x 1 hertz

1 ohm x 1 metre

All of above

The Si unit of Mutual inductance is:

Choose an answer

VA^-1S^-1

VAS^-1

VSA^-1

ASV^-1

The winding of the electromagnet in motor are usually called.

Choose an answer

Magnetic coils

Field coils

Electric coils

electric o electric coils

Electromagnetic induction is exactly according to law of:

Choose an answer

Momentum

Charge

Energy

Mass

More Classes

Other Links

Ics Part 2 Physics Chapter 4 Test Online 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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer