Published:2013/6/18 21:00:00 Author:muriel | Keyword: Really Basic Electricity | From:SeekIC
This page provides some really basic information on Direct Current electricity. It might be called Theory but will not be very in depth. The diagrams will be basic and the explanations will brief and to the point.
For the purposes of the Basic Electronics pages at this site it will be assumed that current flow is from the positive to the negative.Every circuit must contain the following elements; A Source of Electrons and a Load. These elements are able to produce useful work from the circuit and can be combined in an infinite number of ways to form any circuit.
SOURCE OF ELECTRONS The source of electrons in the circuit can be any of a wide range of devices. These include batteries, photovoltaic cells and thermocouples. The most usual source of electrons in model railroad circuits is the secondary of a stepdown transformer.
LOAD The load in the circuit coverts the flow of electrons into usable work. The work can include the production of light from light emitting diodes or the creation of a magnetic field in a motor or switch machine.
To provide a way of determining the work done by a circuit the energy in the circuit can be expressed using the following perameters.
VOLTS Is the force that causes the electrons to flow through a circuit. The greater the force, the higher the number of electrons that can be forced through a given circuit.
AMPS Is the rate of electron flow in the circuit. The greater the rate of electrons flowing the greater the work that will be done.
RESISTANCE Is the opposition to the flow of electrons in the circuit. The greater the resistance, the lower the rate of electron (Amps) flow in a circuit for a given voltage.
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