The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field is applied across each of them. Compare the currents in them.

Options

A. Current in p-type `gt` current in n-type
B. Current in n-type `gt` current in p-type
C. No current will flow in p-type, current will only flow in n-type
D. Current in n-type = current in p-type

Answer

B

Explanation

Semiconductor
`I="ne" Av_(d)`
`v_(d)mu E`
`l="ne"A mu E`
`mu=` Majority of charge carriers
`mu_("holes") lt mu_("free electron")`
`n_("holes")=n_("free electron")`
`I_(P"type") lt I_(n"type")`