Question:
The electron drift speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to
The electron drift speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to
Updated On: Jun 7, 2024
- the conducting property of the conductor
- the resistance of the conductor is small
- the electron number density of the conductor is small
- the electron number density of the conductor is enormous.
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The Correct Option is D
Solution and Explanation
In a conductor, the electron number density
i.e., number of electrons per unit volume of a conductor is very large $\left(=10^{28} m ^{-3}\right)$, so large current in a conductor is obtained irrespective of their small drift speed.
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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.