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) No current will flow in p-type, current will only flow in n-type.

(2) current in n-type = current in p-type.

(3) current in p-type > current in n-type.

(4) current in n-type > current in p-type.

(1) No current will flow in p-type, current will only flow in n-type.

(2) current in n-type = current in p-type.

(3) current in p-type > current in n-type.

(4) current in n-type > current in p-type.