Question

the bulb of resistance of 1725 Ohm works on 345 volt supply calculate the quantity of heat generated in 3 minutes​

Answer 1

Answer:

12420J

Explanation:

Given,

R = 1725ohms

V = 345V

T = 3mins = 3 × 60 = 180s

H = I²RT

I = V/R

putting in joules law we get

H = (V²/R²)×RT

H = (V²/R) × T

Putting in the values we get

H = (345²/1725) × 180

H = (119025/1725) × 180 = 69 × 180

Therefore H = 12420J

Therefore Heat generated is 12420J

Hope you understood it........All the best