A motor of power 60 W draws current 5 A from a source of 15 V. What is loss of power ?

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.

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 building has two air-conditioners of power 2 kW each, 5 fans of power 120 W each, and 8 lamps of power 25 W each. If the supply voltage is 220 V, the maximum current that the building can draw from the supply is close to (in Ampere):

A building has two air-conditioners of power 2 kW each, 5 fans of power 120 W each, and 8 lamps of power 25 W each. If the supply voltage is 220 V, the maximum current that the building can draw from the supply is close to (in Ampere):

The resistance of the filament of a bulb is 1000 Omega . It is drawing a current from a source of 230 V. How much current isflowing through it?

The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the 3 source. What current will the heater draw if the potential difference is increased to 172.5 V?

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.

A circuit connected with a source of 230 V, draws a current of 2A and power consumed from it is 100 W, then power factor of the circuit is …….