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Drift of Electrons- 1 Video Lecture | Physics for EmSAT Achieve

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1. What is drift of electrons?
Ans. The drift of electrons refers to the movement of electrons in a conductor due to the presence of an electric field. When an electric field is applied to a conductor, the electrons move in the direction opposite to the electric field, resulting in a net flow of electrons called drift.
2. How does the drift of electrons occur?
Ans. The drift of electrons occurs due to the collision of free electrons with atoms or ions in the conductor. When an electric field is applied, the free electrons experience a force that accelerates them in the opposite direction of the field. However, the collisions with atoms or ions randomize their direction, resulting in a net drift in the opposite direction of the electric field.
3. What factors affect the drift velocity of electrons?
Ans. The drift velocity of electrons depends on several factors, including the magnitude of the electric field, the density of free electrons in the conductor, and the average time between collisions. A stronger electric field, higher electron density, and longer collision time all contribute to an increase in the drift velocity.
4. How does the drift of electrons contribute to the flow of electric current?
Ans. The drift of electrons is responsible for the flow of electric current in a conductor. As electrons experience a net drift in one direction due to the electric field, they create a flow of charge. This movement of charge is what we commonly refer to as an electric current.
5. Is the drift of electrons the only factor that determines the flow of electric current?
Ans. No, the drift of electrons is not the only factor that determines the flow of electric current. In addition to the drift, the flow of current also depends on the density of mobile charge carriers, such as free electrons or positive holes, in the conductor. The mobility of these charge carriers, which determines how easily they can move through the material, also plays a significant role in determining the flow of electric current.
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