Question: Q. 4. In an unbiased
(a) free electrons in the
(b) they move across the junction by the potential difference.
(c) hole concentration in
(d) All the above.
[NCERT Exemplar]
Ans Correct option : (c)
Explanation : The diffusion of charge carriers across a junction takes place from the regions of higher concentration to lower concentration. In this case, the
Q. 5. When a forward bias is applied to a
(a) raises the potential barrier.
(b) reduces the majority carrier current to zero.
(c) lower the potential barrier.
(d) None of the above
[NCERT Exemplar]
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Solution:
Ans. Correct option : (c)
Explanation: When a forward bias is applied to a
