Question

an electric oven of resistance 20 ohm a current of 10amphere it works 3hr daily calculate the monthly bill where energy cost rs 4kilo watt/hr

Answer 1

P=I*I*R
=10*10*20=2000W

total cost=2000*4= rs.8000

Answer 2

R=20

I= 10A

P= I×I×R

10×10×20

= 2000÷1000= 2 kwh×3= 6kwh×4= 24₹