In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be______________?

Related Mcqs:

Starters are used with D.C. motors because______________?

A. these motors have high starting torque B. these motors are not self-starting C. back e.m.f. of these motors is zero initially D. to restrict armature current as there is no back e.m.f. while starting...

Which of the following law/rule can he used to determine the direction of rotation of D.C. motor ?

A. Lenz’s law B. Faraday’s law C. Coloumb’s law D. Fleming’s left-hand rule...

The armature torque of the D.C. shunt motor is proportional to____________?

A. field flux only B. armature current only C. both A. and B. D. none of the above...

Which of the following steps is likely to result in reduction of hysteresis loss in a D.C. generator ?

A. Providing laminations in armature core B. Providing laminations in stator C. Using non-magnetic material for frame D. Using material of low hysteresis co-efficient for armature core material...

Armature reaction in dc motor results___________?

A. decrease in speed B. increase in speed C. short circuit D. open circuit...