The m² V⁻¹ s⁻¹ is the SI unit of which of the following?

• A. Drift Velocity
• B. Mobility
• C. Resistivity
• D. Potential gradient

The unit m² V⁻¹ s⁻¹ is associated with the concept of mobility in physics, particularly in the context of charge carriers like electrons in a semiconductor or conductor.

Understanding Mobility

Mobility refers to how quickly charge carriers can move through a material when an electric field is applied. It is a crucial parameter in determining the performance of electronic devices.

Other Options Explained

• Drift Velocity: This is the average velocity of charge carriers due to an electric field, measured in meters per second (m/s).
• Resistivity: This property indicates how strongly a material opposes the flow of electric current, typically measured in ohm-meters (Ω·m).
• Potential Gradient: This refers to the change in electric potential per unit distance, measured in volts per meter (V/m).

In summary, the correct answer is Mobility, as it is the only option that corresponds to the unit m² V⁻¹ s⁻¹.