1000+ Electrical Materials Objective Questions and Answers Pdf - 1

Question: 1

A unit cell is

(A) a cube containing the largest number of atoms

(B) the smallest group of atoms which when regularly repeated forms the crystal

(C) the basic building block of crystal

(D) an agglomerated structure

Question: 2

The energy gap in divalent metals is

(A) large

(B) zero

(C) very small

(D) fairly small

Question: 3

What is the name of fluorescent material that gives red colour fluorescence?

(A) magnesium silicate

(B) zinc sulphide

(C) zinc silicate

(D) calcium silicate

Question: 4

The permanent magnets are made from which of following materials?

(A) diamagnetic

(B) paramagnetic

(C) ferromagnetic

(D) soft iron

Question: 5

Material science deals with

(A) solids and vapours

(B) gases and liquids

(C) molten metals

(D) solid materials