set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The mobility of conduction electrons is greater than that of holes, since electrons

a) are negatively charged

b) require smaller energy for moving through crystal lattice

c) are lighter

d) undergo smaller number of collisions

Question : 2

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 : 3

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 : 4

An electric bulb is filled with

a) oxygen and hydrogen

b) ammonia

c) hydrogen

d) nitrogen and argon

Question : 5

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

Question : 6

A fuse wire is characterized by

a) High resistance and low melting point

b) Low resistance and high melting point

c) Low resistance and low melting point

d) High resistance and high melting point