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in Physics by (79.0k points)

An electric bulb is marked 200V, 100W. Calculate electrical resistance of its filament. If five such bulb are connected in series to a 200V supply, how much current will flow through them?

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Five of such bulbs when connected in series with a 200V supply, the voltage across each lamp is 40V (voltage is divided in series) So current through each bulb

V= IR

40= I 400

I = 1/10 A

I = 0.1 A

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