Q. The power of pump, which can pump $200\ kg$ of water to a height of $50\ m$ in $10\ sec$, will be
A) $10 \times 10^{3}\ watt$
B) $20 \times 10^{3}\ watt$
C) $4 \times 10^{3}\ watt$
D) $60 \times 10^{3}\ watt$
Explanation
(a) $P = \frac{W}{t} = \frac{mgh}{t} = \frac{200 \times 10 \times 50}{10} = 10 \times 10^{3}W$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.