energi listrik dan daya

Electric energy and power

Electric energy.

When battreis are used to turn lamp. They must do the work equal to the increase of electric potential energy. Because the chemical energy in battreis becomes electric current and charge move becouse there are difference potential. So the electric energy can be written as

Where:

W= electric energi (J)

Q= charge (C)

V= pottential difference (V)

If:

So:

Or:

Or:

R= resistance (Ohm)