Which of the following expressions gives the electric power of a resistor only in…

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

Problem

Which of the following expressions gives the electric power of a resistor only in terms of current

I

and resistance

R

? (a)

P = 2 I^{2} R

(b)

P = I^{2} R

(c)

P = \dfrac{1}{2} I^{2} R

(d)

P = \sqrt{2}\, I^{2} R