Mechanical Power

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 .

In a motor the electrical power input is 500 W and the mechanical power output is 0.54 horse power. Heat developed in the motor in 1 h is (assuming that all the electric energy which is not converted to mechanical energy is converted to heat) is

In a motor the electrical power input is 500 W and the mechanical power output is 0.54 horse power. Heat developed in the motor in 1 h is (assuming that all the electric energy which is not converted to mechanical energy is converted to heat) is

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 ?

Conservation Of Mechanical Energy|Power

Conservation Of Mechanical Energy|Power

Conservation Of Mechanical Energy|Power

Power Station A : Potential energy > Kinetic energy > Mechanical energy > Electrical energy Power Station B : Chemical energy > Heatenergy > Mechanical energy > Electrical energy Power Station C : Nuclear energy > Heat energy > Mechanical energy > Electrical energy. Identify the above power stations A, B, and C based on the energy change taking place in them.