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Resistance of P-N Junction

An incandesce...

Question

An incandescent lamp is operated at $240 V$ and the current is $0.5 A$ . What is the resistance of the lamp?

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Solution

$V = 240 v o l t; I = 0.5 A; R = ?$
$V = I R$
$R = \frac{V}{I} = \frac{240}{0.5}$
$R = 480 Ω$

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