Question

an electric iron box of resistance 20 volt consumer a current of 5 ampemeter calculate the heat developed in 30 seconds

Answer 1

Answer:

v=20 volts

i=5ammeter

p=v×i

p=20×5

p=100watt

p=100/1000kilowatt

p=0.1kw

t=30sec

t=0.00833hours

e=p×t

e=0.1×0.00833

e=0.000833kwh