Question

Two electric bulbs, each designed to operate with a power of 500 watts in 220 V in series with a 110 volt line. what will be the power generated by each bulb?

Answer 1

We know

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

$500=\frac{{220}^2}{R}$

$R=\frac{{220}^2}{500}$

$R=96.8\Omega$

Now, power at 110 V line

$P=\frac{{110}^2}{96.8}$

$P=125watts$