Assertion :At absolute zero semiconductors behaves as the ideal insulator. Reason: In semiconductor electron vibration happen at room temperature. But at very low-temperature electron can not get energy and so it can not vibrate. and so current can not pass,so semiconductor act as an insulator.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
At absolute zero, at (0 K), the covalent bonds between atoms in a semiconductor are complete. They are held at their mean position, and cannot vibrate. As a result, there are no free electrons available for conduction of current. Hence, semiconductor behaves as an insulator at $T = 0 K$ .

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(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

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