A small d.c. motor operating at 200 V draws a current of 5.0 amp.at its full speed of 3000 r.p.m. The resistance of the armature of the motor is `8.5 Omega`. Determine the back e.m.f. of the motor. Obtain the power input, power output and efficiency of motor.

A small d.c. motor operating at 200 V draws a current of 5.0 A at its full speed of 3,000 r.p.m. The resistance of the armature of the motor is 8.5 Omega. Determine the back e.m.f. of the motor. Obtain the power input, power output (mechanical) and the efficiency of the motor.

A small dc motor operating at 200 V draws a current of 5.0 A at its full speed of 100 pi rad s^(-1) . The resistance of the armature of the motor is 10 Omega . Determine the back emf of the motor. Obtain the power input, power output and efficiency of the motor.

An electric motor operating at 200 V draws a current of 5 A at its full speed. The resistance of the armature is 10 Omega . Calculate the back e.m.f. and efficiency of the motor?

An electric motor operating on 50 volt D.C. supply draws a current of 10 amp. If the efficiency of motor is 40% then the resistance of the winding of the motor is

An electric motor runs a D.C. source of e.m.f. 200 V and draws a current of 10A . If the efficiency is 40% , then ressistance of the armature is: