During rheostat braking of D.C. series motors_____________?

Related Mcqs:

A direct on line starter is used: for starting motors___________?

A. up to 5 H.P B. up to 10 H.P C. up to 15 H.P D. up to 20 H.P...

In D.C. motor which of the following can sustain the maximum temperature rise?

A. Slip rings B. Commutator C. Field winding D. Armature winding...

As -the load is increased the speed of D.C. shunt motor will____________?

A. reduce slightly B. increase slightly C. increase proportionately D. remains unchanged...

If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will_________?

A. increase B. decrease C. remain same D. become zero...

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens____________?

A. this will make armature to take heavy current, possibly burning it B. this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses C. nothing will happen to motor D. motor will come to stop...