A moving iron meter operates by applying which type of current to the coil?

A moving iron meter operates by utilizing the magnetic properties of the coil in response to current. This type of meter is versatile and can function effectively with both alternating current (AC) and direct current (DC).

When current flows through the coil, it creates a magnetic field, causing a moving iron piece inside the meter to deflect. The principle relies on the fact that the iron responds to the strength of the magnetic field, which is influenced by the amount of current passing through the coil, regardless of whether it is AC or DC.

This characteristic allows moving iron meters to be applicable in various situations where current measurement is required. It also contributes to their robustness and reliability, enabling them to measure a wide range of electrical phenomena without being limited to a specific type of current.