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Two conductors have the same resistances at 0°C but their temperature coefficients of resistance are α 1 and α 2 . The respective temperature coefficients for their series and parallel combinations are:

1. 2 , 2 1 2 1 α + α α + α
2. 2 1 2 1 , 2 α + α α + α
3. 2 , 2 2 1 2 1 α + α α + α
4. 2 1 2 1 2 1 a , α + α α α + α CAREER POINT CAREER POINT Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 081-47250011 www.careerpoint.ac.in 6 JEE Main Online Paper

Correct answer: 2 , 2 2 1 2 1 α + α α + α

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