Please explain me the difference between a moving coil ammeter and moving iron ammeter?

Question

plz tell me the mecahanism of the working of both. Also why the moving coil can be used for both AC and DC currents whereas moving iron can measure only ac. also specify the theory between both their working

Answer 1

Kery above has answered correctly according to his generation. Now you can read it on the computers

Answer 2

An ammeter is a measuring instrument used to measure the electric current in a circuit. Electric currents are measured in amperes, hence the name. The word "ammeter" is commonly misspelled or mispronounced as "ampmeter" or "ameter" by some.

The earliest design is the D'Arsonval galvanometer or moving coil ammeter. It uses magnetic deflection, where current passing through a coil causes the coil to move in a magnetic field. The voltage drop across the coil is kept to a minimum to minimize resistance across the ammeter in any circuit into which it is inserted.

Moving iron ammeters use a piece or pieces of iron which move when acted upon by the electromagnetic force of a fixed coil of (usually heavy gauge) wire. This type of meter responds to both direct and alternating currents (as opposed to the moving coil ammeter, which works on direct current only).

AJM

Answer 3

First of all, you need to go and read your text book. The moving iron, or vane meter is pushed by a magnetic field. The vane meter would not be able to respond fast enough to AC, or it would be very jittery. The moving coil also uses magnetic fields, but does so from the influence of a permanent magnet. From here, hit the books to learn it all for yourself.