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  4. Ten 60 W , 220 V bulbs are connected in series to 220 V supply. Power consumed in the circuit is

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Q. Ten $60 \,W , 220 \,V$ bulbs are connected in series to $220\, V$ supply. Power consumed in the circuit is

Current Electricity

Solution:

$P=\frac{V^{2}}{R}$
$R=\frac{V^{2}}{P}=\frac{(220)^{2}}{60}$
$P_{\text {Total }}=\frac{V^{2}}{R_{e q}} $
$=\frac{(220)^{2}}{10(220)^{2}} \cdot 60=6\,W$