As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit____________________?

Related Mcqs:

The size of poxvirus is_______________?

A. 20 nm B. 200 nm C. 250 nm D. 300 nm...

If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ?

A. Series motor B. Shunt motor C. Differentially compound motor D. Cumulative compound motor...

The current drawn by the armature of D.C. motor is directly proportional to__________?

A. the torque required B. the speed of the motor C. the voltage across the terminals D. none of the above...

If I2 be the armature current, then speed of a D.C. shunt motor is_______________?

A. independent of Ia B. proportional to la C. varies as (Ia) D. varies as la...

In a D.C. generator, the iron losses mainly take place in___________/

A. yoke B. commutator C. armature conductors D. armature rotor...