Question

What is the rate at which heat energy is produced if current of 2.0a flows through 10 ohm resistor?

Answer 1

I= 2 A
R= 20Ω
H=?
We can solve it from the given relation
H= I^2Rt
Assuming the time to be 1 sec
H= 4 x 20 x 1
H= 80J

80 J of heat is produced when 2A of current flows through a resistor of 20Ω for 1 sec