Question

Question 2
Which of the following terms does not represent electrical power in a circuit?

(a) $I^{2}R$
(b) $I{R}^2$
(c) VI
(d) $\frac{V^2}{R}$

Answer 1

(b) $I{R}^2$

We know that, P = VI......................equation (1)
According to Ohm's law, V = IR........equation (2)
On putting the value of equation (2) in equation (1), we can get two relations:
$I^{2}R$ and $\frac{V^2}{R}$
Thus, electrical power cannot be represented by $I{R}^2$.