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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 semiconductorsI 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»

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.



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