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In an unbiased p-n junction holes diffus...

In an unbiased p-n junction holes diffuse from the p-region to the n-region because

A

free electrons in the n-region attract them

B

they move across the junction by the potential difference

C

hole concentration in p-region is more as compared to n-region

D

all the above

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • 4 In an unbiased p-n junction, holes diffuse from the p-region to n-region because

    A
    free electrons in the n-region attract them.
    B
    they move across the junction by the potential difference.
    C
    hole concentration in p-region is more as compared to n-region.
    D
    All the above.

  • If a p-n junction is reverse biased then

    A
    a potential barrier is created at the junction
    B
    the effective resistance reaches an infinite value
    C
    a small current is obtained due to diffusion of majority carrier electrons and holes
    D
    In spite of increasing the reverse bias the reverse current remains almost unchanged

  • When a p-n junction is reverse biased then

    A
    no current flows
    B
    the depletion layer is increased
    C
    the depletion layer is decreased
    D
    hight of potential barriers is reduced

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