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Derive equa1ion of mobility in terms of relaxation time (tau). Wrile its unit. |
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Answer» Solution :`rArr` Drift velocity of electron in PRESENCE of external electric field, `|v_(d) | = (EE)/(m) .tau` (Velocity = acceleration `xx ` time ) `tau ` = time INTERVAL between two successive collision `(|v_(d)|)/(E) = (e tau)/(m)` `therefore MU = (e tau )/(m)` SI unit `(ms^(-1))/(VM^(-1)) = m^(2) V^(-1) S^(-1)` |
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