Question

Assertion :The power of a pump which raises $100kg$ of water in $10sec$ to a height of $100m$ is $10KW$. Reason: The practical unit of power is horse power.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

The power of the pump is the work done by it per sec

$\therefore$ Power $=\frac{work}{time}=\frac{mgh}{t}=\frac{100\times 10\times 100}{10}$

$={10}^{4}W=10kW$

Also 1 Horse power (hp) =$746W$