Ask or Answer

🏠 Home🏷️ Tags❔ Ask a Question✔️ Answer a QuestionUsers
128 views

Please log in or register to answer this question.

1 Answer

Answer :

Sparking, is discouraged in a D.C. motor because commutator gets damaged.

Like 0 like

Related Questions

151 views

Last Answer : Sparking at the commutator of a D.C. motor may result in damage to commutator segments, damage to commutator insulation, increased power consumption.

1 answer
111 views

Description : Sparking occurs when a load is switched off because the circuit has high?

Last Answer : Sparking occurs when a load is switched off because the circuit has high inductance.

1 answer
71 views

Last Answer : For starting a D.C. motor a starter is required because it limits the starting current to a safe value.

1 answer
124 views

Description : Describe the reason of using dc series motor for electric trains.

Last Answer : Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains

1 answer
342 views

Description : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be 474 V

1 answer
Show MoreAsk QuestionNext Page →