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A free electron at rest in an electric field will experience a force due to the field and will accelerate in the direction of the electric field. The electron will gain kinetic energy and start moving in the direction of the force until it reaches a velocity where the force due to the field is balanced by other forces acting on the electron.
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What actually causes the electrons to move?
Electron movement is primarily caused by an electric field. When a voltage is applied across a conductor, such as a wire, the electric field pushes the free electrons in the conductor to move in a particular direction, creating an electric current.
How does an electron move in an electric field and what factors influence its motion?
An electron moves in an electric field by experiencing a force that causes it to accelerate in the direction of the field. Factors that influence its motion include the strength of the electric field, the charge of the electron, and any other forces acting on the electron.
Explain with the help of diagram how free electrons and hole contribute to electric current?
In a semiconductor material, free electrons and holes can conduct electricity. Free electrons are negatively charged particles that move in response to an electric field, creating an electron flow or current. Holes are spaces within the crystal lattice where an electron is missing, and they behave as positively charged carriers that can also move in response to an electric field, contributing to the overall current flow. Both free electrons and holes play a role in conducting electricity in semiconductors.
What do you mean by drift velocity and mobility of a free electron?
Drift velocity Vd = acceleration x relaxation time So Vd = (E e / m) * t Now Vd / E is defined as the drift velocity per unit electric field and known to be mobility of free electron Hence mobility = (e/m) x t Thus mobility will be different in different material as it depends on relaxation time. e/m is the specific charge of electron which is a constant value equals to 1.759 x 1011
What will be the effect on the motion of electron if it travels along the dirction of electric field?
If an electron moves in the direction of an electric field, it will experience an acceleration in the same direction as the field. This will cause the electron's motion to speed up. If the electron is already moving with a velocity in the direction of the electric field, it will continue to move with a constant velocity.
What actually causes the electrons to move?
Electron movement is primarily caused by an electric field. When a voltage is applied across a conductor, such as a wire, the electric field pushes the free electrons in the conductor to move in a particular direction, creating an electric current.
How does an electron move in an electric field and what factors influence its motion?
An electron moves in an electric field by experiencing a force that causes it to accelerate in the direction of the field. Factors that influence its motion include the strength of the electric field, the charge of the electron, and any other forces acting on the electron.
If a stationary electron sat inside a stationary electric field would the electric field cause the electron to move?
Yes. Stationary electric (electrostatic) fields will act on each other and a force will be developed. If you had a standing electric field and could "beam in" an electron (a la Star Trek), the electron would react at once and move either toward a positive field source or away from a negative field source. The electron would know the field was there the instant it appeared.
Explain with the help of diagram how free electrons and hole contribute to electric current?
In a semiconductor material, free electrons and holes can conduct electricity. Free electrons are negatively charged particles that move in response to an electric field, creating an electron flow or current. Holes are spaces within the crystal lattice where an electron is missing, and they behave as positively charged carriers that can also move in response to an electric field, contributing to the overall current flow. Both free electrons and holes play a role in conducting electricity in semiconductors.
What do you mean by drift velocity and mobility of a free electron?
Drift velocity Vd = acceleration x relaxation time So Vd = (E e / m) * t Now Vd / E is defined as the drift velocity per unit electric field and known to be mobility of free electron Hence mobility = (e/m) x t Thus mobility will be different in different material as it depends on relaxation time. e/m is the specific charge of electron which is a constant value equals to 1.759 x 1011
What will be the effect on the motion of electron if it travels along the dirction of electric field?
If an electron moves in the direction of an electric field, it will experience an acceleration in the same direction as the field. This will cause the electron's motion to speed up. If the electron is already moving with a velocity in the direction of the electric field, it will continue to move with a constant velocity.
Why there is no current in a metal in the absence of electric field across it?
In the absence of an electric field, there are no external forces acting on the charges in the metal to generate a current. A current only flows in a metal when there is an electric field present to move the charges. Without an electric field, the charges in the metal remain stationary.
What is classical free electron theory of metal?
Classical free electron theory is modeled by drude - Lorentz to explian elctrical conductivity in metals. According to this free electron in a metal (valence electron) move randdomly at room temperature and these free electron are drifted in opposite to the direection of the applied electric field. This is repsonsible for the conduction. Here all the free elctron are are considered as equal in all aspect.
Why is there no electric field inside a conductor?
Inside a conductor, the electric charges are free to move and redistribute themselves to cancel out any external electric field. This results in no net electric field inside the conductor.
If you place a charge into an electric fieldit will move in the direction indicated by the electric field lines?
Yes, a charge placed in an electric field will experience a force in the direction of the field lines due to the interaction between the charge and the field. The charge will move along the field lines if it is free to do so.
Do electrons move up or down a potential gradient?
The potential gradient gives the electric field intensity E at point in electric field which is directed from high to low potential. An electron being a negative charge particle therefore will tend to move from low potential to high potential, hence will move up the electric field
How would a proton's motion differ from the motion of an electron placed at the same point in the same electric field?
First of all, the forces they experience would be in exactly the opposite directions. Secondly, because the mass of the proton is greater, it would have a lower acceleration than the electron.
