set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

How does the white light produce in the tube?

a) To accelerate the atoms

b) To heat up the copper wire

c) To heat up the filament

d) To oscillate molecule

Question : 2

Curie temperature is the temperature above which

a) a ferromagnetic material becomes diamagnetic

b) a ferromagnetic material becomes paramagenetic

c) a paramagnetic material becomes diamagnetic

d) a paramagnetic m aterial becomes ferromagnetic

Question : 3

The core of a transformer is laminated because

a) ratio of voltage in primary and secondary may be increased

b) the weight of the transformer may be reduced

c) rusting of the core may be prevented

d) energy losses due to eddy currents may be minimised

Question : 4

Which of the following option represents the consumption of power in ascending order?

a) Fan, television, electronic press, electronic kettle

b) Television, fan, electronic press, electronic kettle

c) Television, fan, electronic kettle, electronic press

d) Electronic press, electronic kettle, fan, television

Question : 5

An electric bulb is filled with

a) oxygen and hydrogen

b) ammonia

c) hydrogen

d) nitrogen and argon

Question : 6

Match list I with list II and select the correct answer using the codes given below the lists

a) A – 3 ; B – 1 ; C – 2 ; D – 4

b) A – 3 ; B – 1 ; C – 2 ; D – 4

c) A – 4 ; B – 2 ; C – 3 ; D – 1

d) A – 2 ; B – 4 ; C – 1 ; D – 3