The mobility of charge carriers increases with
Show Hint
The mobility of charge carriers in a current-carrying conductor is the net average velocity with which free electrons move towards the positive end of a conductor under the influence of an externally applied electric field.
- increase in the average collision time
- increase in the electric field
- increase in the mass of the charge carriers
- decrease in the charge of the mobile carriers
The Correct Option is A
Solution and Explanation
The mobility of charge carriers increases with an increase in the average collision time.
- The mobility of charge carriers in a current-carrying conductor is the net average velocity with which free electrons move towards the positive end of a conductor under the influence of an externally applied electric field.
- If q is the charge of the carrier, τ is the relaxation time, and m is the mass of the charge carrier, then mobility μ = mqτ.
Therefore, the correct answer is option a, increase in the average collision time.
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Concepts Used:
Electric Current
Defining Electric Current
It is the rate of flow of electrons in a conductor. SI Unit - Ampere (A).
Electrons are negatively charged particles hence when they move a number of charges moves.
Note:- The ability of a particular substance to conduct electricity depends on the number of electrons that are able to move . Some of the materials allow current to flow better than others.
What is an Electromotive Force?
If a force acts on electrons to make them move in a particular direction, then up to some extent random motion of the electrons will be eliminated. An overall movement in one direction. The force which acts on the electrons to move them in a certain direction is known as electromotive force and its quantity is known as voltage and is measured in V.
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