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Resistance of tungsten filament in one b...

Resistance of tungsten filament in one bulb at `20 ""^(@)C " is " 18 Omega`. When this bulb is connected to 60 V source, steady current passing through it is 0.3 A. Find temperature of this filament taking `alpha = 4.5 xx 10^(-3) K^(-1)` . Assume that Ohm's law is obeyed.

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`theta = 2070. 7 K`
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