The hysteresis loss in a D.C. machine least depends on____________?

Related Mcqs:

Differentially compound D.C. motors can find applications requiring___________?

A. high starting torque B. low starting torque C. variable speed D. frequent on-off cycles...

When two D.C. series motors are connected in parallel, the resultant speed is____________?

A. more than the normal speed B. loss than the normal speed C. normal speed D. zero...

Which D.C. motor has got maximum self loading property?

A. Series motor B. Shunt motor C. Cumulatively compounded ‘motor D. Differentially compounded motor...

If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor_____________?

A. of lower H.P. should be selected B. of higher H.P. should be selected C. can be used for 50°C ambient temperature also D. is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor...

In variable speed motor___________?

A. a stronger commutating field is needed at low speed than at high speed B. a weaker commutating field is needed at low speed than at high speed C. same commutating field is needed at low speed than at high speed D. none of the above is correct...