NEET Physics Ohm's Law MCQ Question
A schematic diagram shows an electron moving from a point A to another point B through repeated collisions and straight-line travel between collisions. What does the average velocity of electrons become immediately after any collision?
Zero
Constant
Equal to drift velocity
Proportional to electric field
Correct Answer
Detailed Explanation
The average of the velocities of electrons (v_i's) is zero immediately after any collision because the direction of the velocity of an electron is completely random.
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