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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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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A stone is tied to a string of length l and whirled in a vertical circle with the other end
- If μᵥ=1.5230 and μʀ=15.145, then dispersive power of crown glass is
- The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
- Two coherent sources of different intensities send waves which interfere.
- A wire of length L metre carrying a current I ampere is bent in the form
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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