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 Which of the following statements is not true?

Option: 1

The resistance of intrinsic semiconductors decrease with increase of temperature


Option: 2

Doping pure  Si with trivalent impurities give P-type semiconductors


Option: 3

The majority carriers in N-type semiconductors are holes


Option: 4

A PN-junction can act as a semiconductor diode


Answers (1)

best_answer

 In N-type semiconductors majority of charge carriers are electrons. The pentavalent impurity or dopant elements are added to the N-type semiconductor to increase the number of electrons for conduction. 

Hence the correct option is (3). 

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manish

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