1000+ Electrical Engineering Materials MCQ Questions & Answers - 2

Question: 6

Germanium possesses

(A) five valence electrons

(B) four valence electrons

(C) three valence electrons

(D) two valence electrons

Question: 7

The permeability of iron is around

(A) 500

(B) 800

(C) 1200

(D) 2000

Question: 8

_____ is the most detrimental impurity in the magnetic materials.

(A) nitrogen

(B) oxygen

(C) sulphur

(D) carbon

Question: 9

Superconducting metal in super conducting state has relative permeability of

(A) negative

(B) zero

(C) one

(D) more than one

Question: 10

The converse of hardness is known as

(A) softness

(B) malleability

(C) toughness

(D) none of the above