In a long p-type Si-bar with cross-sectional area = 0.5 cm2 and Na = 2 – McqOptions

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1.	In a long p-type Si-bar with cross-sectional area = 0.5 cm2 and Na = 2 × 1017 cm-3, extra holes = 1016 cm-3 are injected. Assume μp = 500 cm2/Vs, ni = 1010 cm-3 and τp = 10-10 s, find minority carrier lifetime.
A.	10 μs
B.	15 μs
C.	20 μs
D.	Data insufficient
Answer» E.

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In a long p-type Si-bar with cross-sectional area = 0.5 cm2 and Na = 2 × 1017 cm-3, extra holes = 1016 cm-3 are injected. Assume μp = 500 cm2/Vs, ni = 1010 cm-3 and τp = 10-10 s, find minority carrier lifetime.