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Q.

A potential barrier V volts exists across a P-N junction. The thickness of the depletion region is ‘d’. An electron with velocity 'v' approches P-N junction from N-side. The velocity of the electron acrossing the junction is

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a

v2+2Vem

b

v2−2Vem

c

v

d

2Vem

answer is B.

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Detailed Solution

v2 - u2 = 2as  and a=eEm  and E= Vd
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A potential barrier V volts exists across a P-N junction. The thickness of the depletion region is ‘d’. An electron with velocity 'v' approches P-N junction from N-side. The velocity of the electron acrossing the junction is