Which of the following expressions correctly represents the electrical power…

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

Problem

Which of the following expressions correctly represents the electrical power dissipated in a resistor when only the current

I

through it and its resistance

R

are known? (a)

P = VI

(b)

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

(c)

P = I^{2}R

(d)

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