Question

An electric iron of resistance 20 ohm takes a current of 8 ampere. calculate the heat develiped in 50 s

Answer 1

Thank you for asking this question.  A really easy but an interesting question to ask. 
So the work done by the circuit becomes around 20*8 = 160. So the total heat energy that can be developed in 50 seconds is equal to 160/50 which comes out to be 3.2 as energy is equal to the work done divided by time.
I hope this answer can help you in some manner.