Q. A tap supplies water at 22$℃$, a man takes of 1 L of water per min at 37$℃$ from the geyser. The power of geyser is
A) 525 W
B) 1050 W
C) 1775 W
D) 2100 W
Explanation
(b) Mass of water $= volume \times density$
$= 1000 \times 1 =$ 1000 g.
Heat taken by water $= mc\ \mathrm{\Delta}\theta$
$= 1000 \times 1(37 - 22)$ cal
$= 1000 \times 15 \times 4.2$ J
Power of geyser$= \frac{energy\ spent}{time}$
$\ = \frac{1000 \times 15 \times 4.2}{60}1050$ W.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.