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Question and Answer

A  light bulb is rate at  \(110\;W\)  for a  \(220\;V\) supply. Find the  current through the bulb.

Answer

\(I=0.45\;A\)
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Solution

Given-power of bulb \(P = 110 W\)
and voltage of bulb\( V = 220 V\)
To find - current\(I\) through the bulb
We know that  \(P=\mathit{V}I\)
Therefore, we have
current through bulb is given by
 \(I=\frac P V=\frac{100}{220}=0.45A\)
Hence the current through bulb is \(I=0.45A\)
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