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  • The drift velocity of the electrons in a copper wire of length 2 m under the application of potential difference of 200 Volt is 0.5 meter per second. Their mobility is

The drift velocity of the electrons in a copper wire of length 2 m under the application of potential difference of 200 Volt is 0.5 meter per second. Their mobility is

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Drift velocity = mobility x electric field

\\v_d=\mu E\\E=V/l=200/2=100\ V/m\\\mu=\frac{v_d}{E}=\frac{0.5}{100}=5\times10^{-3}m^2V^{-1}s^{-1}

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Safeer PP

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