Question

What is the range of the flux density in the teeth at no load?

(a) 1.7-1.8 Wb per mm^2

(b) 1.3-1.5 Wb per mm^2

(c) 1.3-1.6 Wb per mm^2

(d) 1.4-1.6 Wb per mm^2

This question was posed to me in an interview for job.

This intriguing question comes from Slot Dimensions in portion Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Correct option is (a) 1.7-1.8 Wb per mm^2

For explanation I would say: The minimum value of the flux density in the teeth is given to be 1.7 Wb per mm^2. The maximum value of the flux density in the teeth is given to be 1.8 A per mm^2.