Question

Which of the following is/are true for metallic conductors?

• A. No chemical changes are there
• B. Mass transfer occurs
• C. Resistance arises because of the collision of electrons with metal atoms
• D. Higher the temperature lower is the metallic conductance

Answer 1

Answer: (A), (C), (D)

Higher the temperature lower is the metallic conductance

Metallic conductance:
The conductance is due to the presence of free mobile electrons.
Characteristics of Metallic Conductors

1. No chemical changes.
2. No transfer of mass.
3. Resistance (opposition to the current flow) arises because of the collision of electrons with metal atoms.Generally, good conductors have low resistance.
4. Metallic conductance is inversly proportional to temperature whereas metallic resistance is directly proportional to temperature