An electric motor drill, rated 350 W has an efficiency of 35%. The torque produced, if it is working at 3000 rpm.

An electric motor drill, rated 350 W has an efficiency of 35%. The tor

1.	An electric motor drill, rated 350 W has an efficiency of 35%. The torque produced, if it is working at 3000 rpm.
Answer» 0.25 N m 0.35 N m 0.39 N m 0.30 N m Solution :Angular velocity of the motor drill , `omega = (2PI epsilon)/(60) = (2 pi xx 3000)/(60)` Let `tau` be the torque produced by the motor. Power produced = `tau omega = tau xx (2pi xx 3000)/(60)` Now `tau xx (2 pi xx 3000)/(60) = 35%` of 350 W or `tau xx 2pi xx 50 = (35)/(100) xx 350` or `tau = (35 xx 350)/(100 xx 2pi xx 50) = 0.39 Nm`