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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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(136)
Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following is not due to total internal reflection?
- A sound source is moving towards a stationary listener with 1/10th of the speed
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- The diameter of the eye ball of a normal eye is about 2.5 cm. The power of the eye
- An electric kettle has two heating elements. One brings it to boil in ten minutes
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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