Question

What is the expression for the electrical power spent inflow of current through a conductor in terms of current and resistance?

• A. $I^{2}R$
• B. $IR$
• C. $\frac{I^2}{R}$
• D. None of these

Answer 1

The correct option is A $I^{2}R$

The rate at which electric energy is dissipated or consumed in an electric circuit is known as electrical power.

Power, $P=VI$

where $V=$ voltage applied and $I=$ current

According to Ohm's law,

$V=IR$

where $R=$ resistance

$\therefore P=\left(IR\right)\times I$

$P=I^{2}R$