Asked by Joe

A current of 1 A is maintained in a simple circuit with a total resistance of 2.5 Ω. How much heat is generated in 4.0 s?
Answered by Damon
Hey, I took the course and already know how to do these, now you try and ask us if you get stuck showing where you got stuck.
Answered by Joe
P = I²R = 1*2.5 = 2.5 watts

1 watt is a Joule per second, or a Joule is a watt-second

E = 2.5 J/s x 4.0s = 10 Joules

It says I need more numbers for the answer...
Answered by Damon
10 Joules is correct to 2 significant figures. Try 10. or 10.0
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