Question

Choose the correct statement. In conductors

• A. valence band and conduction band overlap each other.
• B. valence band and conduction band are separated by a large energy gap.
• C. very small number of electrons are available for electrical conduction.
• D. valence band and conduction band are separated by a small energy gap.

Hint:

In conductors, the valence band and conduction band overlap, making it easy for electrons to flow and conduct electricity.

Answer 1

The Correct Option is A

Step 1: Understanding conductors.
In conductors, the valence band and conduction band overlap, meaning that electrons in the valence band can easily move into the conduction band when an external electric field is applied, allowing electrical conduction.

Step 2: Analyzing the options.
- (A) Valence band and conduction band overlap each other. This is correct for conductors. - (B) In conductors, the valence and conduction bands do not have a large energy gap, as this would prevent easy conduction of electrons. - (C) In conductors, a large number of electrons are available for electrical conduction, not a very small number. - (D) In conductors, the gap between the valence and conduction bands is either very small or nonexistent.

Step 3: Conclusion.
The correct answer is (A), as conductors have overlapping valence and conduction bands.