Mathematics

Problem

Which of the following expressions gives the electrical power

P

dissipated in a resistor of resistance

R

when a potential difference

V

is applied across it? a)

P = \dfrac{V^{2}}{2R}

P = \dfrac{1}{2}VI

P = \dfrac{V^{2}}{R}

P = \dfrac{I^{2}R}{2}