# Answer to Question #73945 in Electric Circuits for Ayrill

Question #73945

What is the potential difference between two points in a circuit if 200J of electrical energy are changed to other forms of energy when 25 coulombs of electric charge pass? If the charge flows in 10 seconds, what is the current?

Expert's answer

We know, W = q.V …………………………(1)

Where , W =energy, q = charge and V = potential energy

Here, W = 200 J , q = 25 coulomb and we have to find V.

Now, put the value of W and q we get, 200 = 25 × V ………………………..(2)

Rearranging equation (2) we get,

V = 200/25 = 8 volts.

Again we know, I = q/t ………………….(3)

Where, q = charge, t = time, I = current

Here, q = 25 coulombs, t = 10 sec., we have to find I.

Now, put the value of q and t in equation (3), we get,

I = 25/10 = 2.5 amps.

Answer: Potential difference is 8 volts. and the current is 2.5 amps.

Where , W =energy, q = charge and V = potential energy

Here, W = 200 J , q = 25 coulomb and we have to find V.

Now, put the value of W and q we get, 200 = 25 × V ………………………..(2)

Rearranging equation (2) we get,

V = 200/25 = 8 volts.

Again we know, I = q/t ………………….(3)

Where, q = charge, t = time, I = current

Here, q = 25 coulombs, t = 10 sec., we have to find I.

Now, put the value of q and t in equation (3), we get,

I = 25/10 = 2.5 amps.

Answer: Potential difference is 8 volts. and the current is 2.5 amps.

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