1. The potential difference or voltage,V, across two points is defined as energy,E, dissipated or transferred by coulomb of charge,Q, that moves through the two points.

Therefore:

Potential difference = Electrical energy dissipated / Charge

V= E / Q

2. Current is the rate of charge flow. Therefore, the total charge flows through the two points is given as:

Q = It I = current, t = time in second

3. Since the energy dissipated or transferred is given by:

E= VQ

Therefore, the relationship between E, V,I and t can be written as:

E = VIt

4. From Ohm’s law, V =IR, therefore,

E = IR × It

E = I²Rt

5. From I = V / R = > ; E = V

## 2010-01-18

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## 12 comments:

Very nice description,i impressed

so much sense has been made in me now!

Write a textbook sir. That is the best description relating those 3 I have seen yet.

Fully illustrated.

I don't understand no. 5.

Please help.

...

l

5.E= VQ

does I has direct relation with V or not? am confused on the given equation

thanks

Your explanation is very clear and convenient. Thank you for taking the time and clearing the unexplained things for us!

thanks

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