JAMB - Physics (1997 - No. 35)
What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs?
5.3 x 103J
6.5 X 103J
1.8 X 107J
2.3 X 107J
คำอธิบาย
Energy = power x time
= 1000 x 5 x 3600
= 1.8 X 107J
= 1000 x 5 x 3600
= 1.8 X 107J