What type of torque is required for the effective rotation of a wiper contact in a potentiometer?

The effective rotation of a wiper contact in a potentiometer necessitates high drive torque to ensure proper functionality. A potentiometer typically consists of a resistive element along which the wiper slides to create a variable resistance based on its position. For this system to work efficiently, the wiper must have enough torque to overcome any friction associated with the resistive track and maintain a stable connection while moving across the surface.

High drive torque is essential for certain applications, particularly where the potentiometer experiences mechanical resistance or when the wiper needs to move smoothly across the resistive element without interruptions. This ensures consistent electrical contact and prevents issues like jitter or cut-out signals that can occur if insufficient torque is applied.

In contrast, minimal torque would be inadequate, as it might not overcome the frictional forces acting on the wiper, while variable and constant torque options do not pertain to the specific requirements for smooth continuous movement needed throughout the potentiometer’s operational range. The need for sustained effective contact throughout the potential range of motion further highlights why high drive torque is the optimal choice for this application.