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Copper and carbon wires are connected in series and the combined resistor is kept

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:

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