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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: - A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
- A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall.
- In an ammeter, 0.2% of main current passes through the galvanometer
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
- A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall.
- In an ammeter, 0.2% of main current passes through the galvanometer
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- The potential differences across the resistance, capacitance and inductance
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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