# The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them (a) No current will flow in p-type, but current will only flow in n-type. (b) Current in n-type = current in p-type (c) Current in p-type > current in n-type (d) Current in n-type > current in p-type

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Updated on: September 13th, 2023

We know that the current through the semiconductor is

I = neAvd = neAµE [As vd = µE]

Where µ is the mobility of charge carriers

We can write it as

In/Ip = neeAµeE/nheAµhE

By further simplification

In/Ip = µeh

Here µe > µh

In > Ip

Therefore, the current in n-type > current in p-type.

Summary:

## (d) Current in n-type > current in p-type

The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Current in n-type > current in p-type.

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