Indicate which of the following material does not retain magnetism permanently.

The property of a material which enables it to retain the deformation permanently, is called

A

Brittleness

B

Ductility

C

Malleability

D

Plasticity

A material is able to retain the deformation permanently by virtue of its

A

Elasticity

B

Plasticity

C

Ductility

D

Malleability

The commonly used material for shielding or screening magnetism is

A

copper

B

aluminium

C

soft iron

D

brass

The material which can be deformed permanently by heat and pressure is called a

A

thermoplastic

B

thermoset

C

chemical compound

D

polymer

Which one of the following phrases best describes residual magnetism?

A

Magnetism that remains in the core of an electromagnet after the current through the coil is turned off

B

The force of attraction between the poles of a permanent and temporary magnetic field

C

The amount of magnetic flux that is not confined to the core material of an electromagnet

D

The circular magnetic field that surrounds a conductor carrying a current

E

None of the above

Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles ?

A

Series generator

B

Shunt generator

C

Compound generator

D

None of the above

Which of the following layers of the Earth is believed to account for the Earth's magnetism?

A

Crust

B

Mantle

C

Core

D

Lithosphere

Following D.C. generator will be in a position to build up without any residual magnetism in the poles

A

Series generator

B

Shunt generator

C

Compound generator

D

Self-excited generator

Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics?

A

James Clerk Maxwell

B

Michael Faraday

C

Haris Christian Oersted

D

Isaac Newton

The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

A

Chromium

B

Nickel

C

Vanadium

D

Cobalt

Indicate which of the following material does not retain magnetism permanently.

Related Questions