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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The velocity v of waves produced in water depends on their wavelength λ, the density
- The equations of motion of a projectile are given by x=36 t metre and 2y=96t-9.8t²
- If the focal length of objective lens is increased, then magnifying power of
- A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm.
- An electric dipole of length 1 cm is placed with the axis making an angle of 30⁰
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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