Write short note on Electrical Energy.

1.	Write short note on Electrical Energy.
Answer» Because of the existence of resistance to the flow of current work has to be done in order to maintain the flow of current. Since the potential difference V is the work done to carry unit positive charge from infinity to a point, the work done to carry a charge q is given by: W= qV But I = q/t So W = ItV Since V = I R W = I²Rt = V²t/R This work done is stored as energy. SI unit of electrical energy is Joule.

Answer»

Because of the existence of resistance to the flow of current work has to be done in order to maintain the flow of current.

Since the potential difference V is the work done to carry unit positive charge from infinity to a point, the work done to carry a charge q is given by:

W= qV

But I = q/t

So W = ItV

Since V = I R

W = I²Rt = V²t/R

This work done is stored as energy.

SI unit of electrical energy is Joule.

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Write short note on Electrical Energy.

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