The drift velocity of the electrons in a...

The drift velocity of the electrons in a copper wire of length 2 m under the application of a potential difference of 220V is `0.5ms^-1` . Their mobility ( in `m^2v^-1s^-1`)

`2.5 xx10^(-3)`

`2.5 xx10^(-2)`

`5xx10^2`

`4.5xx10^(-3)`

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