Free Printable Unit I Electromagnetism

1.

The material which possess the property of attracting iron particles by nature is called

a)

Ferro material

b)

Magnet

c)

Attracting material

d)

Non-magnet

2.

The region in which magnetic lines of force acts is called

a)

Electric field

b)

Magnetic field

c)

Electro magnetic field

d)

Dynamic field

3.

The temporary magnet which becomes strong magnet when current is passed through it called ______

a)

Electro Magnet

b)

Non Magnet

c)

Permanent Magnet

d)

Ferro Magnet

4.

The magnetism retained in the material after the removal of magnetizing force is called _________ magnetism

a)

Retained

b)

Residual

c)

Induced

d)

Permanent

5.

The magnet which retains magnetism even when the current passed through it is stopped is called ___ Magnet

a)

Electro

b)

Permanent

c)

Dia

d)

Para

6.

The magnet that is used in loud speaker is ____ magnet

a)

Electro

b)

Permanent

c)

Dia

d)

Para

7.

The unit of magnetic flux is

a)

ampere

b)

volt

c)

weber

d)

farad

8.

Flux is repesented by the symbol

a)

A

b)

B

c)

Φ

d)

H

9.

The force which establishes the magnetic flux in a magnetic circuit is called

a)

EMF

b)

MMF

c)

BMF

d)

LMF

10.

Unit of Magneto motive force

a)

Flux turns

b)

Ampere turns

c)

Flux turns per metre

d)

volt turns

11.

The opposition to the establishment of magnetic flux in a magnetic circuit is called

a)

Resistance

b)

Reluctance

c)

Permeance

d)

Permitivity

12.

The current that flows in the magnetic material (Core) because of change in flux linking with the material (Core) is called

a)

Alternating current

b)

Pulsating current

c)

Eddy Current

d)

DC current

13.

Faraday's law states that an _____ is induced in the coil when it is moved in a magnetic field

a)

MMF

b)

EMF

c)

Torque

d)

Heat

14.

In Fleming's right hand rule, fore finger indicates the direction of _______

a)

Magnetic Flux

b)

Movement of the conductor

c)

EMF induced in the conductor

d)

MMF

15.

The emf induced in the conductor because of flux change in them even when they are stationary is called _____

a)

Back emf

b)

Statically induced emf

c)

mutually induced emf

d)

Dynamically induced emf

16.

The emf induced in a conductor when there is change in flux in neighbouring coil is called

a)

Back emf

b)

Statically induced emf

c)

mutually induced emf

d)

Dynamically induced emf

17.

Transformer works on the principle of

a)

Back emf

b)

Proximity emf

c)

mutually induced emf

d)

Dynamically induced emf

18.

Effect opposes the cause. This is called

a)

Flemings's Left Hand rule

b)

Fleming's Right Hand rule

c)

Maxwell's Cork screw rule

d)

Lenz's law

19.

Fleming's Left Hand rule is used for ______

a)

DC generators

b)

DC Motors

c)

Transformers

d)

Induction motors

20.

The rule that gives the direction of flux produced for a given direction of current is

a)

Flemings's Left Hand rule

b)

Fleming's Right Hand rule

c)

Maxwell's Cork screw rule

d)

Lenz's law

Unit I Electromagnetism

Total questions: 20

Worksheet time: 7mins

Similar Resources on Wayground