1000+ Magnetic Circuit Multiple Choice Questions and Answers Pdf - 1

Question: 1

An electromagnet uses

(A) copper core

(B) nickel core

(C) steel core

(D) soft iron core

Question: 2

The hysteresis loop for materials having high retentivity is

(A) narrow

(B) wide

(C) straight line passing through origin

(D) data insufficient

Question: 3

Out of the following materials, the area of hysteresis loop will be least for

(A) soft iron

(B) silicon steel

(C) hard steel

(D) wrought iron

Question: 4

The curie temperature of iron is

(A) 200°C

(B) 430°C

(C) 550°C

(D) 770°C

Question: 5

Due to fringing at the air gaps in a magnetic circuit, the effective area of the air gaps is

(A) decreased

(B) increased

(C) remains same

(D) none of these