Ammeters,Voltmeters,Ohmmeters

This page is created by jlukose6

This page will describe certain tools that are used in measuring various values inside of a circuit. Using these tools can help you calculate current, voltage, power and resistance across various circuits.

Ammeters

What is an Ammeter

An Ammeter is a measuring device used to measure the electric current in a circuit. It can be used in both series and parallel circuits. This is plausible through the very negligible resistance that the Ammeter introduces to the circuit. It allows us to measure the current running through a circuit element very closely. An Ammeter measures current in Amperes(A) named after Andre Marie Ampere.

Connecting Ammeters

To properly use Ammeters, they must be inserted into a circuit in series with the element that you want to measure. You bring the current into the + socket and out of the - socket. If a positive number is read then the conventional current is flowing into the + socket. Therefore, a negative number is read when conventional current flows into the - socket.

Ammeter in Parallel?

One rule of Ammeters is to have a low resistance so it doesn't alter the current through the circuit and the element that is being measured. So,what happens if you connect the Ammeter in parallel?

This would create an extremely low resistance path("short circuit"). All of the current would then pass through the Ammeter and the reading would be a measurement of the maximum current that the batteries(voltage source) can provide.

Voltmeters

This topic is dedicated to Voltmeters which are used to measure potential difference across a circuit and its various components.

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