1000+ Electrical Materials MCQ Questions and Answers Pdf - 1

Question: 1

The unit of ionization potential is the same as that of

(A) radiation’s frequency

(B) electron affinity

(C) electron energy

(D) electronic charge

Question: 2

Which material among the following possesses excellent dielectric properties and good reliability for use in making capacitors?

(A) chromium oxide

(B) tin oxide

(C) silicon dioxide

(D) silicon monoxide

Question: 3

Magnetic susceptibility is

(A) proportional to temperature but independent of magnetizing field

(B) proportional to temperature but inversely proportional to magnetizing field

(C) inversely proportional to both temperature and magnetic field

(D) inversely proportional to temperature but independent of magnetizing field

Question: 4

Dielectric loss due to ionization is peculiar to

(A) gaseous dielectrics

(B) non ferrous dielectrics

(C) non metallic dielectrics

(D) non uniform dielectrics

Question: 5

The electrical conductivity of copper reduces with the addition of a small amount of nickel because

(A) the electrons of copper become bound to nickel and are not free to move

(B) less free electrons are available for conduction

(C) nickel is ferromagnetic

(D) the mobility decreases due to creation of new scattering for electrons