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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,
Related Questions: - Which of the following physical quantities has neither dimensions nor unit
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
- A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following physical quantities has neither dimensions nor unit
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
- A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- A cockroach is moving with a velocity v in anticlockwise direction on the rim
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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