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All About Circuits
1
Pages in Chapter 2
Voltmeter Usage
Ohmmeter Usage
A Very Simple Circuit
How to Use an Ammeter to Measure Current
Ohm’s Law
Nonlinear Resistance
Power Dissipation
Circuit With a Switch
Electromagnetism Experiment
Electromagnetic Induction Experiment
How to Use an Ammeter to Measure Current
Chapter 2 - Basic Concepts and Test Equipment
PDF Version
Parts and Materials
6-volt battery
6-volt incandescent lamp
Basic circuit construction components such as breadboard, terminal strip, and jumper wires are also assumed to be available from now on, leaving only components and materials unique to the project listed under “Parts and Materials”.
Further Reading
Lessons In Electric Circuits, Volume 1, chapter 1: “Basic Concepts of Electricity”
Lessons In Electric Circuits, Volume 1, chapter 8: “DC Metering Circuits”
Ammeter Usage Learning Objectives
How to measure current with a multimeter
How to check a multimeter’s internal fuse
Selection of proper meter range
Ammeter Schematic Diagram
Ammeter Illustration
Experiment Instructions
Current is the measure of the rate of electron “flow” in a circuit. It is measured in the unit of the Ampere, simply called “Amp,” (A).
The most common way to measure current in a circuit is to break the circuit open and insert an “ammeter” in series (in-line) with the circuit so that all electrons flowing through the circuit also have to go through the meter.
Because measuring current in this manner requires the meter be made part of the circuit, it is a more difficult type of measurement to make than either voltage or resistance.
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