7000+ Material Science and Metallurgy MCQ Pdf - 3

Question: 11

The residual resistivity of a metal is

(A) Temperature dependent

(B) Temperature independent

(C) Due to lattice vibrations at high temperature

(D) Due to photon scattering at high temperature

Question: 12

Pure metals generally have

(A) High conductivity and large temperature coefficient

(B) High conductivity and low temperature coefficient

(C) Low conductivity and high temperature coefficient

(D) Low conductivity and zero temperature coefficient

Question: 13

A permeable substance is one

(A) Through which magnetic lines of force can pass can pass easily

(B) Which is a good conductor

(C) Which is weak magnetic

(D) Which is strong magnetic

Question: 14

Which material is used for making permanent magnet?

(A) Silicon

(B) Carbon steel

(C) Germanium

(D) None of the above

Question: 15

Which of the following magnetic materials has the highest reluctance?

(A) Diamagnetic

(B) Paramagnetic

(C) Ferromagnetic

(D) None of the above