Question

An electric heater where resistance is 300Ω draws 2ampere current from mains. Calculate the amount of heat energy generated if it draws for 30 mins.​

Answer 1

Answer:

H=$i^{2}$Rt

i= 2a

R= 300 Ω

t=30 min

= 1800 seconds

H=$2^{2}$*300*1800

=2160000 J or 2160kJ