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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
- The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
- A battery of e.m.f. E and internal resistance r is connected to an external resistance
- The work function for metals A,B abd C are respectively 1.92 eV,2.0 eV and 5 eV.
- A solid sphere of mass M, radius R and having moment of inertia about an axis passing
- A charged particle experiences magnetic force in the presence of magnetic field.
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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