What is Ammeter | Ammeter Circuit | Working Principle & Types of Ammeter | Physics concepts

What is Ammeter Ammeter circuit working principle of ammeter types of ammeter Physics concepts.

An ammeter (from Ampere Meter) is a measuring instrument used to measure the current in a circuit.
Electric currents are measured in amperes (A), hence the name.
Instruments used to measure smaller currents, in the milliampere or microampere range, are designated as milliammeters or microammeters.
In order for an ammeter to measure a device’s current, it must be connected in series to that device.
This is necessary because objects in series experience the same current.
They must not be connected to a voltage source — ammeters are designed to work under a minimal burden, (which refers to the voltage drop across the ammeter, typically a small fraction of a volt).
The main principle of ammeter is that it must have a very low resistance and also inductive reactance.
Depending on the constructing principle, there are many types of ammeter we get, they are mainly –
Permanent Magnet Moving Coil(PMMC) ammeter.
Moving Iron(MI) Ammeter.
Electrodynamometer type Ammeter.
Rectifier type Ammeter.
Depending on this types of measurement we do, we have-
DC Ammeter.
AC Ammeter.

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