Assertion: In n-type semiconductors electrons are the majority charge carriers and holes are the minority charge carriers.Reason: n-type semiconductor is electrically neutral.
Correct answer: B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion
- A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion
- B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion
- C. If Assertion is a true statement but Reason is false
- D. If both Assertion and Reason are false statements
Explanation
The assertion is true: In n-type semiconductors, electrons are the majority charge carriers and holes are the minority charge carriers. This is due to the doping process that adds extra electrons to the semiconductor material. The reason is also true: n-type semiconductors are electrically neutral because the number of positive charges (protons in the nucleus) balances the number of negative charges (electrons). However, the reason does not explain why electrons are the majority carriers; it is an independent fact about the semiconductor's electrical neutrality. Hence, Option B is the correct answer. Options A, C, and D are incorrect because they misrepresent the truth value or the explanatory power of the reason in relation to the assertion.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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