set 6 MCQ Questions & Answers Detailed Explanation

Question : 1

The resistance of a thin wire in comparison of a thick wire of the same material

a) is equal

b) depends upon the metal of the wire

c) is low

d) is high

Question : 2

Which of the following metals is used as filament in lighting bulbs?

a) Silver

b) Iron

c) Molybdenum

d) Tungsten

Question : 3

Which one of the following heater element is used in electric press?

a) Nichrome wire

b) Lead wire

c) Copper wire

d) Iron wire

Question : 4

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 : 5

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

a) Copper-nickel alloy

b) Soft iron

c) Steel

d) Air

Question : 6

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