A current of 200 mA through a conductor converts 40 joules of electrical energy into heat in 30 seconds determine the p otential drop across the conductor

ou have I=200mA, E=40J, t=30s, and you want to find the voltage drop.

First, you should know that  P=V⋅I , so V=PI

Second, you have the amount of energy converted in a certain amount of time, so E=P⋅t

So, find the power and use it to find the voltage drop.

this works , but i thought energy was defined by W = P * t whitch would then be P = W/t

i'm just gonna leave this comment here, so i can get a challange done-

explanation: