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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
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two spheres A and B of masses m and m respectively collide. A is at rest initially
- One solid sphere A and another hollow sphere B are of same mass and same outer radii.
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- A point source is kept at a distnace 1000m has an illumination I. To change the illumination
- The angular momentum of an electron is J. The magnitude of the magnetic moment
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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