Question

What is the relation between the output and the flux density?

(a) flux density is directly proportional to the output

(b) flux density is indirectly proportional to the output

(c) flux density is directly proportional to the square of the output

(d) flux density is indirectly proportional to the square of the output

This question was posed to me during an online exam.

This interesting question is from Relation Between Rating, Dimensions, Variation of Output of Rotating Machines topic in division General Concepts and Constraints in Design of Rotating Machines of Design of Electrical Machines

Answer 1

The correct choice is (a) flux density is directly proportional to the output

Explanation: Flux density is one of the factors used in the determination of the specific magnetic loading. The flux density is directly proportional to the output.