Question

A computer is marked 230 V; 950 W

Calculate the resistance of the computer.

Answer 1

We have to use Ohm's law to find the computer resistance:

$V=IR; P=IV \implies P = \cfrac{V^2}{R} \\ \implies R=\cfrac{V^2}{P}=\cfrac{(230\,V)^2}{950\,W}=55.68\,\Omega$

In conclusion, the resistance of the computer is $55.68\,\Omega$.

Reference:

• Sears, F. W., & Zemansky, M. W. (1973). University physics.