Question

An electric device operates at $24V$ and has a resistance of $8\Omega$ Calculate the power of the device and the current flowing through it.

Answer 1

Step 1: Determining the power of the device:

Given data:

$V=24V$

$R=8\Omega$

The power of the device:

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

$=\frac{24\times 24}{8}$

$=\frac{576}{8}$

$=72W$

Therefore, the power of the device is $72W$.

Step 2: Calculating the current:

$P=VI$

$72=24\times I$

$I=\frac{72}{24}$

$I=3A$

Therefore, the current flowing is $3A$ .