Question

Details of 2 electric heaters are given :how much will be the heat developed if they are made to work for 5 minutes each?

Answer 1

it's because electricity is very high quality energy, and heat is very low quality energy. It takes far more heat energy to produce a given amount of electric power than you can get back by turning it directly into heat. Sorry, that's just the way the universe works.

HEATING EFFECT OF ELECTRIC CUURENT. Introduction. When current flows through a conductor, heat energy is generated in the ... E = Pt = V2/R *t = (2402 *5*60)/500 = 34,560J.

Convert 30 minute into second = 30 minute = 30 x 60 = 1800 sec.