Electric Current And Magnetism - Category Wise Question And Answer Practice Test With Solutions

Question : 11

An alternating current can be converted into direct current by a

a) transformer

b) dynamo

c) rectifier

d) motor

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Question : 12

The energy band gap is minimum in

a) superconductors

b) insulators

c) metals

d) semiconductors.

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Question : 13

In an electric motor, conversion takes place of

a) electrical energy into mechanical energy

b) electrical energy into light energy

c) chemical energy into electrical energy

d) electrical energy into chemical energy

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Question : 14 [RAS/RTS (Pre) 1999]

The filament of a halogen lamp is an alloy of

a) Tungsten and sodium

b) Tungsten and iodine

c) Tungsten and bromine

d) Molybdenum and sodium

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Question : 15

Match list-I with list -II:

Select the correct answer using the codes given below the lists:

a) A – 4 ; B – 3 ; C – 2 ; D – 1

b) A – 3 ; B – 1 ; C – 2 ; D – 4

c) A – 4 ; B – 2 ; C – 3 ; D – 1

d) A – 2 ; B – 3 ; C – 1 ; D – 4

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