# Question #4d763

##### 1 Answer

Apr 21, 2014

Hello! I'm guessing you're studying circuit diagrams or of the like? I'm actually in grade 11 and just finished this unit!

In any case, you can use Ohm's law, V=IR and it's rearranged forms, to solve problems like these!

In regards to potential difference, you are solving for V... Where I is the current (in amps) and R is the resistance (in ohms).

If I was to say, determine the potential difference over a resistor of 12ohms with a current flow of 2A.

You would sub in the known values and solve:

V=IR

V=(2)(12)

V=24v

Therefore, the potential difference is 24 volts!

Hope this helps! :)