An electric motor operates on a 50V supply and draws a current of 12A. If the motor yields a mechanical power of 150W. What is the percentage efficiency of the motor?

An electric motor operates on a 110 V supply and draws a current of 10 A. If the motor yields a mechanical power of 330 watt, what is the efficiency of the motor ?

An electric motor operating on a 30V supply draws a current of 10A and yields mechanical power of 120W. What is the efficiency of the motor? How much energy is lost as heat in 2h?

An electric motor operates on a 50V d.c. supply draw a current of 15 A . If the motor yields a mechanical power of 150 W estimate the power dissipated across its windings. Also find the efficiency of the motor ?

An electric motor operating on a 50V d.e. supply draws a current of 12A. If the efficiency of the motor is 30\%, estimate the resistance of the windings of the motor.

An electric motor operator on 15 V supply, draws a current of 5 A and yields mechanical power of 60 W . The energy lost as heat in one hour (in kJ) is.

An electric motor operating on a 50 V dc supply draws a current of 12 A . If the efficiency of the motor is 30 % ,estimate the resistance of the windings of the motor.

The efficiency of a motor is defined as the ratio of mechanical power output to that with input electric power. The motor is designed to operate at 100 V and it draws a current of 15 A . If output mechanical power of motor is 800 W, then calculate the efficiency of motor .

An electric motor operating on a 60 V dc supply draws a currrent of 10A . If the effeciency of the motor is 50% , the resistance of its winding is

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