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 operates on a `50V` d.c. supply draw a current of `1

1.	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 ?
Answer» Correct Answer - `600 W,20%` Total power of moter `P = VI = 50 xx 15 = 750 W` mechhanical power of motor `P = 150 W` power dissipated across the winding of motor `= 750 - 150 = 600 W` Efficiency of moter `= (P)/(P) xx 100 = (150)/(150) xx 100 = 20%`

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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 ?

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