Question

The average distance travelled by an electron between two successive collisions in the presence of applied field is called -​

Answer 1

Answer:

It is defined as the drift velocity of the charge carrier per unit applied electric field. The average time taken by a free electron between two successive collisions is called collision time. The average distance travelled by a free electron between two successive collisions is called mean free path.

Answer 2

The average distance traveled by an electron between two successive collisions in the presence of an applied field is called the mean free path.

• The motion of the molecules in a gaseous environment is never uninterrupted or in a straight line.
• This occurs as a result of their collisions, which force them to alter their speed and direction.
• A molecule moves a path length between every two collisions.
• The mean free path is the sum of all the distances between collisions.
• The average distance between collisions for a gas molecule is known as its mean free path.
• It is represented as λ (lambda).
• Mean free path depends on certain factors like density, radius of molecule, number of molecules, temperature, pressure etc.

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