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Question
A bulb of resistance 400 Ω is connected to 200 V mains. Calculate the magnitude of the current.
Numerical
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Solution
R = 400 Ω; V = 200 V; I = ?
By Ohm's law, \[I = \frac{V}{R}\]
\[=\frac{200}{400}\]
= 0.5 A
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