MAGNETISM IMPORTANT QUESTIONS

MAGNETISM IMPORTANT QUESTIONS

*The phenomenon of attraction of a substance by a magnet is called 

Ans : Magnetism 

*Magnetic substances are

Ans : Iron, Nickel, Cobalt and certain alloys

*A naturally occurring magnet 

Ans : Lodestone

*Magnetism was first discovered in 

Ans : Lodestone

*Every magnet has two poles

Ans : A North pole and a South pole Like poles repel and unlike pole attract

*The field around a magnet where its magnetic effect is felt 

Ans : Magnetic field

*Permanent magnet is made up of 

Ans : Alnico

*Electromagnet is made up of 

Ans : Pure Iron

*Molecular theory of magnetism was proposed by 

Ans : Weber

*The magnetism of a substance decreases while on

Ans : Heating or hammering

*In a magnet the magnetic line of force are from

Ans : North to South pole 

*Artificial magnets made by the use of electricity are called

Ans : Electromagnets

*The instruments which are dependent of magnetic power of electricity are 

Ans : Fan, telephone receiver, dynamo etc

*The scientist who stated that the earth behaves as a huge magnet 

Ans : William Gilbert

*A Magnetic force of attraction at the centre of bar magnet

Ans : Zero

*A coil of insulated wire bound on a rod shaped form made of solid iron is called

Ans : Solenoid

*The unit of magnetic flux density 

Ans : Tesla

*Unit of magnetic flux

Ans : Weber.

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