Question

Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2 A is passed through it for 2 minutes.

Answer 1

Given:R=75 Ω, i =2 A, t = 2 minutes = 2 x 60 s = 120 s

Heat energy produced in the coil,

Answer 2

R=75ohm, I=2A, t=2min=2*60seconds

We know that,

E=VIt

  =I^​​​​​​2​​​​ _Rt

   _=2²*75*120

   _{=36000 J}