Which of the following sets lists only correct expressions for the electric power…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

Which of the following sets lists only correct expressions for the electric power

P

dissipated in a single resistor carrying current

I

, potential difference

V

, and resistance

R

? (a)

P = 2VI,\; P = I^{2}R,\; P = \dfrac{V^{2}}{R}

(b)

P = VI,\; P = \dfrac{1}{2}I^{2}R,\; P = \dfrac{V^{2}}{R}

(c)

P = VI,\; P = I^{2}R,\; P = \dfrac{V^{2}}{R}

(d)

P = VI,\; P = I^{2}R,\; P = \dfrac{V^{2}}{2R}