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Copper and carbon wires are connected in series and the combined resistor is kept at 0⁰C. Assuming the combined resistance does not vary with temperature, the ratio of the resistances of carbon and copper wires at 0⁰C is (Temperature coefficients of resistivity of copper and carbon respectively are 4×10⁻³/ ⁰ C and -0.5×10⁻³/ ⁰ C )
Options
(a) 4
(b) 8
(c) 6
(d) 2
Correct Answer:
8
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Current Electricity
(136)
Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Identify the wrong statement
- A wire of resistance 4 ohm is stretched to twice its original length.
- The speed of an electron having a wavelength of 10⁻¹⁰ m is
- With the decrease of current in the primary coil from 2 amperes to zero value
- Weight of a body of mass m decreases by 1% when it is raised to height h
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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