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The temperatu...

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The temperature coefficient of resistance of tungsten is 4.5 x 10^{-3} ^° C^{-1} and that of germanium is 5 x 10^{-2} ^° C^{-1}, A tungsten wire of resistance 100 Ω is connected in series with a germanium wire ofresistance R. The value of R for which the resistance of combination does not change with temperature is (1) 9Ω (2) 1111Ω (3) 0.9 Ω (4) 111.1Ω

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