Question

Prove that P = V X I

Answer 1

Explanation:

Hello

Power(P) = Potential difference (V) X Current (I)

So

Now by the ohm's law

I =V/R

On substituting value of current in the equation

P=VI

We get

P= V x V/R

P=V^2 / R

Hope it helps

Answer 2

Electric power is the rate at which energy is transferred to or from a part of an electric circuit. A battery can deliver energy, or a circuit element like a resistor can release energy as heat. For any circuit element, the power is equal to the voltage difference across the element multiplied by the current. By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors. Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s).

General form:

electric power = voltage difference x current

P = VI

Resistors:

P = electric power (W)

V = voltage difference (V = J/C)

I = electric current (A = C/s)

R = resistance (Ω = V/A)