Work Energy And Power Question 12
Question: Assertion : The power of a pump which raises 100 kg of water in 10sec to a height of 100 m is 10 KW. Reason : The practical unit of power is horse power.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: B
Solution:
The power of the pump is the work done by it per sec.
Power $ =\frac{work}{time}=\frac{mgh}{t}=\frac{100\times 10\times 100}{10} $
$ =10^{4}W=10kW $ Also 1 Horse power (hp) =746 W.
