Which of the following statements about a potentiometer is true?
Correct Answer: A potentiometer requires a constant current to ensure accurate measurements of voltage.
- Step 1: Understand what a potentiometer is. A potentiometer is a device used to measure voltage by comparing it to a known reference voltage.
- Step 2: Learn about current. Current is the flow of electric charge, and it needs to be stable for accurate measurements.
- Step 3: Realize why constant current is important. If the current changes, the voltage readings can also change, leading to inaccurate measurements.
- Step 4: Conclude that for a potentiometer to give accurate voltage measurements, it must operate with a constant current.
No concepts available.
