Current Electricity: Band Theory of Conductors MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Band Theory of ConductorsHardQuestion 31695

Question

In band theory, metals conduct electricity because:

A
Their valence band is completely full
B
Their conduction band overlaps or is partially filled
Correct
C
They have a large band gap
D
Electrons are tightly bound to nuclei

Correct answer

Their conduction band overlaps or is partially filled

Explanation

Metals have their conduction band partially filled (or overlapping with valence band), giving electrons free states to move into when an electric field is applied.

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