Page 30 - June 2021

(100 cm x 100 cm x 0.5 inches = 13,000 cubic

centimetres of water = 13 kg). If we assume all

the raindrops were on the larger side with a

terminal velocity of 10 m/s, the total kinetic
energy, measured in joules, for all the raindrops

hitting the 1 meter by 1 meter panel over an

hour would be:

Averaging over an hour, or 3,600 seconds, the

power output of the raindrops would be:

To generate enough power for an average INDIA
household, at about 90units = 90KWh electricity

per month= 125 Wh electricity per hour, the

hypothetical panel would take an area about the

size of a football field -- and that's during a
historic rainstorm. It's also assuming,

unrealistically, that the panels are 100%

efficient.

Rohit Bansal

PGT—Physics