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14/09/2021 12:12 pm
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The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
(1) current in n-type = current in p-type
(2) current in p-type > current in n-type
(3) current in n-type > current in p-type
(4) No current will flow in p-type, current will only flow in n-type
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14/09/2021 12:19 pm
Correct answer: (3) current in n-type > current in p-type
Explanation:
In N type semiconductor majority charge carriers are e– and P type semiconductor majority charge carries are holes.
I = neAVd = neA(μE)
μe > μh ⇒ Ie > Ih