Question

A current of 2 A is maintained in a simple circuit with a total resistance of 3.0 Ω. How much heat is generated in 3.5 s?

Answer 1

You're asked for the heat generated. Since you haven't given any other information about the resistor, we'll assume that all the power dissipated in the resistor is converted into heat.

Power = Voltage * Current

You are only given the current and the resistance however. Not the voltage, so we'll have to derive a formula for voltage using the givens.

You should also know that Voltage = Current * Resistance, so now we can rewrite the original equation for power to be:

Power = Current * Resistance * Current or P = I^2* R

Now power is work over time, so you'll have to multiply the power by the amount of time to get your final answer for heat disapated in Joules

Answer 2

Thank you very much, i am going try it now.

Answer 3

good luck

Answer 4

It was definitely right.

Answer 5

Thats good :D