Lesson: Alternating Current Ammeters Physics
In this lesson, we will learn how to describe the construction of ammeters using the thermal expansion of conducting wires to measure alternating currents.
Which of the following would help reduce developing zero errors in a hot-wire ammeter?
Which of the following diagrams most correctly shows the divisions of the scale of a hot-wire ammeter corresponding to equal changes in current?
A hot-wire ammeter is calibrated by using it to measure a direct current source that is also measured by a direct-current ammeter. Which of the following most correctly explains why the divisions on the scale of a hot-wire ammeter would not be spaced equivalently to the divisions on the scale of a direct-current ammeter that had the same resistance?