7000+ Materials Science Questions and Answers Pdf - 3

Question: 11

Which of the following insulating materials has the least affinity for moisture?

(A) Asbestos

(B) Cotton

(C) Mica

(D) Paper

Question: 12

Magnetic cores required for RF applications have

(A) Low hysteresis and high eddy current losses

(B) Low hysteresis and eddy current losses

(C) High hysteresis and eddy current losses

(D) High hysteresis and low eddy current losses

Question: 13

High frequency transformer cores are generally made from

(A) Cobalt

(B) Ferrites

(C) Mone-metal

(D) Mu-metal

Question: 14

Which one of the following pair is NOT correctly matched?

(A) Sodium – Antiferromagnetic

(B) Iron – Ferromagnetic

(C) Ferrite – Ferrimagnetic

(D) Copper – Diamagnetic

Question: 15

A superconductor may be used for generating

(A) Magnetic field

(B) Temperature

(C) Pressure

(D) Voltage