Question

Which of the following is a correct variation of the Joule's law equation? O A. P= I x R2 OB. P = V + OC. P = 12 V OD. P = V2 R​

Answer 1

Answer:

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

Explanation:

Power is defined as the rate at which energy is dissipated.

Its mathematical form is given by :

P = VI

Where

V is voltage and I is current

Using Ohm's law :

$I=\dfrac{V}{R}$, R is resistance

Joule's law equation is given by :

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

Hence, the correct option is (d).