Question

The average time of motion of electrons between two successive collisions with fixed positive ions inside a conductor is called the time.

• A. active
• B. relaxation
• C. collision
• D. none of these

Answer 1

The correct option is B relaxation

That’s just the definition. The average time of motion of electrons between two successive collisions with fixed positive ions inside a conductor is called the relaxation time. I don’t know why they call it the relaxation time. Maybe because this is time when the electrons are “relaxed” as in not colliding.