Explain how electron mobility changes for a good conductor, when (i) the temperature of the conductor is decrased at constant potential difference and (ii) applied potential difference is doubled at constant temperature.

Explain how electron mobility changes for a good conductor, when (i) t

1.	Explain how electron mobility changes for a good conductor, when (i) the temperature of the conductor is decrased at constant potential difference and (ii) applied potential difference is doubled at constant temperature.
Answer» Electron mobility in a conductor is given by `mu = v_(d)/E = ((eE)/(m)tau)/(E) = (e tau)/m` (i) When temperature of the conductor decreases, the relaxation time `tau` of the electrons in the conductor increases, so mobility `mu` increase. (ii) Mobility `mu` is independent of applied potential difference.

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Explain how electron mobility changes for a good conductor, when (i) the temperature of the conductor is decrased at constant potential difference and (ii) applied potential difference is doubled at constant temperature.

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