Q. A one kilowatt motor is used to pump water from a well 10 m deep. The quantity of water pumped out per second is nearly
A) 1 kg
B) 10 kg
C) 100 kg
D) 1000 kg
Explanation
(b) $P = \frac{mgh}{t}$ or $\frac{m}{t} = \frac{P}{gh}$
or $\frac{m}{t} = \frac{1000}{10 \times 10}kg = 10\ kg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.