Question

find the amount of heat produced in a conductor of resistance 30 ohm and current flowing through it in 30 minutes is 20 ampere

Answer 1

heat produced =i^2rt
=20×20×30×30×60 joules

Answer 2

By appying simple formulae

$h = i {}^{2} rt$
We have to find heat so
--»» H = 20×20×30×60
400×900×60== 2160000