Drift velocity is a key concept in physics, particularly in the study of electricity. Here's a step-by-step explanation:

1. Drift velocity refers to the average velocity that a particle, such as an electron, attains due to an electric field.

2. In a conductor, the free electrons move randomly at high speeds. This random motion doesn't cause any net flow of electrons in a particular direction.

3. However, when an electric field is applied, these electrons get a net velocity in a direction opposite to the field. This is because electrons are negatively charged and are thus attracted towards the positive side of the electric field.

4. This net velocity, superimposed on their random motion, is what we call the drift velocity.

5. It's important to note that the drift velocity is usually quite small compared to the random speeds of the electrons. This is because the electric field only slightly biases the direction of the electrons' motion, rather than fully controlling it.

6. The drift velocity is directly proportional to the electric field but inversely proportional to the resistance of the material. This relationship is described by Ohm's law.

7. In mathematical terms, drift velocity (v) can be calculated using the formula: v = I/(nAe), where I is the current, n is the number of charge carriers per unit volume, A is the cross-sectional area of the conductor, and e is the charge of an electron.

Question

Drift velocity is a key concept in physics, particularly in the study of electricity. Here's a step-by-step explanation:

1. Drift velocity refers to the average velocity that a particle, such as an electron, attains due to an electric field.

2. In a conductor, the free electrons move randomly at high speeds. This random motion doesn't cause any net flow of electrons in a particular direction.

3. However, when an electric field is applied, these electrons get a net velocity in a direction opposite to the field. This is because electrons are negatively charged and are thus attracted towards the positive side of the electric field.

4. This net velocity, superimposed on their random motion, is what we call the drift velocity.

5. It's important to note that the drift velocity is usually quite small compared to the random speeds of the electrons. This is because the electric field only slightly biases the direction of the electrons' motion, rather than fully controlling it.

6. The drift velocity is directly proportional to the electric field but inversely proportional to the resistance of the material. This relationship is described by Ohm's law.

7. In mathematical terms, drift velocity (v) can be calculated using the formula: v = I/(nAe), where I is the current, n is the number of charge carriers per unit volume, A is the cross-sectional area of the conductor, and e is the charge of an electron.

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