Question

The dominant contribution to current comes from holes in case of which of the following?

(a) Metals

(b) Intrinsic semiconductors

(c) p-type extrinsic semiconductors

(d) n-type extrinsic semiconductors

I have been asked this question in a national level competition.

I would like to ask this question from Extrinsic Semiconductor topic in chapter Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

Correct answer is (c) p-type extrinsic semiconductors

Best explanation: Holes are the majority charge carriers in p-type extrinsic semiconductors. Trivalent impurities such as boron, indium, and gallium are called acceptor impurity. Also, in p-type semiconductors, electrons are the minority charge carriers.