A light bulb, rated 12V drew 0.5A when it reached a temperature of 40 degrees Celsius. It was switched on at a temperature of 25 degree Celsius. What was the current drawn by the lamp at the moment of switching? (Consider the filament as Tungsten with a temp. coefficient of 0.0051 @ 25 degree Celsius). The total length of the filament is 1.5 inches and cross-sectional area is 100 CM.
A light bulb, rated 12V drew 0.5A when it reached a temperature of 40 degrees Celsius. It was switched on at a temperature of 25 degree Celsius. What was the current drawn by the lamp at the moment of switching? (Consider the filament as Tungsten with a temp. coefficient of 0.0051 @ 25 degree Celsius). The total length of the filament is 1.5 inches and cross-sectional area is 100 CM.
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Transcribed Image Text:A light bulb, rated 12V drew 0.5A when it reached a temperature of 40 degrees
Celsius. It was switched on at a temperature of 25 degree Celsius. What was the
current drawn by the lamp at the moment of switching? (Consider the filament as
Tungsten with a temp. coefficient of 0.0051 @ 25 degree Celsius). The total length
of the filament is 1.5 inches and cross-sectional area is 100 CM.
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