Question

Water falls at a rate pf 600 kg/s from a height of 60 m as shown. How many bulbs of capacity 100 W each will glow from the energy produced at the bottom of the fall. Assume full conversion of energy of falling water and all bulbs glowing at 100 W each.

(a) 25

(b) 50

(c) 3600

(d) 1000

Answer 1

Correct option is (c) 3600

Potential energy loss per second`

= 600(10)(60)J/s

= 36 x 10⁴ j/s = 36 x 10⁴ W

Each bulb consumes 100 W,

∴ Total no of bulbs which can glow is 3600.