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Two tungsten bulbs of wattage 50 W and 6...

Two tungsten bulbs of wattage 50 W and 60 W power work on 220 potential difference. If they are connected in parallel, how much current will flow in the main conductor ?

Text Solution

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Data :' ` P_(1) = 50 W, P_(2) = 60 W, V =220 V, I = ?`
` I = P/V`
` P = VI therefore I_(1) = P_(1)/V and I_(2) = P_(2)/V`
Current in the main conductor, ` I= I_(1) + I_(2) ` ( parallel connection )
`P_(1)/V+ P_(2)/V = (P_(1)+P_(2))/V = ( 50 W + 60 W)/( 220 V) = 110/220 A = 1/2 A`
= 0.5 A
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