Work Energy And Power Question 197
Question: A quarter horse power motor runs at a speed of 600 r.p.m. Assuming 40% efficiency the work done by the motor in one rotation will be [Kerala PET 2002]
Options:
A) 7.46 J
B) 7400 J
C) 7.46 ergs
D) 74.6 J
Show Answer
Answer:
Correct Answer: A
Solution:
Motor makes 600 revolution per minute
n =
Time required for one revolution
But work done = 40% of input %
