set 6 MCQ Questions & Answers Detailed Explanation

Question : 1

The charge given to any conductor resides on its outer surface, because

a) the free charge tends to be in its minimum kinetic energy state

b) the free charge tends to be in its maximum potential energy state.

c) the free charge tends to be in its minimum potential energy state

d) the free charge tends to be in its maximum kinetic energy state

Question : 2

Which is the gas inside an electric bulb?

a) Carbon dioxide

b) Argon

c) Nitrogen

d) Both (A) and (B)

Question : 3

The universal properties of all substances is

a) paramagnetism

b) diamagnetism

c) ferromagnetism

d) All of these

Question : 4

When a solid with a band gap has a donor level just below its empty energy band, the solid is

a) a conductor

b) p-type semiconductor

c) an insulator

d) n-type semiconductor

Question : 5

An electric lamp of 100 watt is used for 10 hours per day. The ‘units’ of energy consumed in one day by the lamp is

a) 10 units

b) 1 unit

c) 0.1 unit

d) 100 units

Question : 6

Reverse bias applied to a junction diode

a) lowers the potential barrier

b) raises the potential barrier

c) increases the minority carrier current

d) increases the majority carrier current