set 6 MCQ Questions & Answers Detailed Explanation

Question : 1

Coulomb’s law is true for

a) nuclear distances (= 10^–15 m)

b) charged as well as uncharged particles

c) atomic distances (= 10^–11 m)

d) all the distances

Question : 2

Which of the following is most suitable for the core of electromagnets?

a) Copper-nickel alloy

b) Soft iron

c) Steel

d) Air

Question : 3

Inverter converts

a) direct current into alternating current

b) current at low voltage to current at high voltage

c) alternating current into direct current

d) None of these

Question : 4

In which one of the following cases Ohm’s law is not valid?

a) Junction diode

b) Wire bound resistor

c) Potentiometer

d) Electric bulb

Question : 5

Alternating current is converted to direct current

a) By Transformer

b) By Dynamo

c) By Motor

d) By Rectifier