Across a conductor of length 40cm, a potential difference of 10V is maintained. The mobility of electrons if the drift velocity of electrons is 5×10−6m/s is
A
2×10−7m2/Vs
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B
1×10−7m2/Vs
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C
4×10−6m2/Vs
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D
0.5×10−7m2/Vs
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Solution
The correct option is A2×10−7m2/Vs Given: vd=5×10−6m/s; V=10V;l=40cm=0.4m