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The average time between collisions for an electron is known as the:

AReflection time
BRefraction time
CRepulsion time
DRelaxation time
Answer & Solution
Correct answer: D. Relaxation time
1. Electrons in a conductor are repeatedly scattered. 2. The mean interval between those events is named. 3. The average value of the intervals is known as relaxation time. 4. So the answer is relaxation time. _Source: syllabus Physics, Ch 3 'Current Electricity'_
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