A heating coil has a resistance of 200 Ω. At what rate will heat be produced in it when a current of 2.5 A flows through it ?

Question

A heating coil has a resistance of 200 &#x3A9;. At what rate will heat be produced in it when a current of 2.5 A flows through it ?

Philoid · Accepted Answer

Here Resistance of the coil(R) = 200 ohms, Current (I) = 2.5 amp, time(t) = 1 sec

We know that according to Joule's law of heating

H = I²RT

H = (2.5)²×200×1

H = 1250 J/s