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The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.

The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C. If its temperature coefficient of resistance be 0.005 per ⁰C, its resistance will become 200Ω at a temperature of

Options

(a) 200⁰C
(b) 300⁰C
(c) 400⁰C
(d) 500⁰C

Correct Answer:

400⁰C

Explanation:

Let Ro be the resistance of bulb filament at at 0°C,

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