Physics

Problem

Which of the following expressions gives the electrical power dissipated in a resistor only in terms of the potential difference

V

across it and its resistance

R

? a)

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

2\,\dfrac{V^{2}}{R}

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

\dfrac{V^{2}}{\sqrt{2}\,R}