Which of the following expressions gives the electrical power dissipated in a…

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

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

V

across it and its resistance

R

? (a)

P = VI

(b)

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

(c)

P = I^{2} R

(d)

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