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() On the basis of electron drift, derive an expression for resistivity of a conductor in terms of the number density of free electrons and relaxation time. On what factors does resistivity of a conductor depends?(ii) Why alloys like constantan and manganin are used for making standard resistors? |
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Answer» the basis of electron drift, derive an expression for resistivity of a conductor in terms of the numberdensity of FREE electrons and relaxation time. On what factors does resistivity of a conductor depends?(ii) Why ALLOYS LIKE CONSTANTAN and manganin are used for making STANDARD resistors? |
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