With reference to conductors, consider the following statements:
1. The valance Band and the conduction band overlap each other.
2. The resistivity of a conductor decreases exponentially with temperature.
3. Conductors conducts the electric current less than semiconductors and greater than insulators.
How many of the above three statements given above are correct?

Correct option is D

The correct answer is (d) Only first statement

Explanation:
• Statement 1 is correct: In conductors (metals), the valence band and conduction band overlap, allowing electrons to move freely.
• Statement 2 is incorrect: The resistivity of a conductor increases with temperature due to increased collisions.
• Statement 3 is incorrect: Conductors conduct current better than semiconductors; semiconductors are intermediate between conductors and insulators.

Information Booster:
• Resistivity ($\rho$) for conductors follows the relation $\rho_t = \rho_0 [1 + \alpha(T - T_0)]$.
• Silver is the best known conductor of electricity.

Additional Knowledge:
Option A
• Incorrect as it includes two false statements.
Option B
• Incorrect because Statement 2 describes semiconductors, not conductors.
Option C
• Incorrect as Statement 2 is wrong.

So the correct answer is (d)