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Physics · PYQ NEET UG 2021

हिन्दी

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 p-type > current in n-type
  2. Current in n-type > current in p-type
  3. No current will flow in p-type, current will only flow in n-type.
  4. Current in n-type = current in p-type

Correct answer · Option 2

Current in n-type > current in p-type

Explanation

Current \( I = neAv_d = neA\mu E \). Since electron mobility \( \mu_e \) is greater than hole mobility \( \mu_h \), the current in the n-type semiconductor is greater than that in the p-type semiconductor.
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