(A) valence band is empty and conduction band is filled with electrons.

(C) valence band is partially filled.

(D) conduction band is partially filled with electrons.

MHT CET · Physics · Semiconductors

In insulators

A valence band is empty and conduction band is filled with electrons.
B conduction band is empty and valence band is completely filled with electrons.
C valence band is partially filled.
D conduction band is partially filled with electrons.

Verified Solution

Answer & Solution

Correct Answer

(B) conduction band is empty and valence band is completely filled with electrons.

Step-by-step Solution

Detailed explanation

Std. \(11 \mid\) Ch- 14 | Subtopic-14.3

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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