reading this section you will be able to do
what circuit diagrams are used for.
what the symbols in the circuit diagrams stand for.
Circuit diagrams are a pictorial
way of showing circuits. Electricians and engineers draw circuit
diagrams to help them design the actual circuits. Here is an example
The important thing to note on this
diagram is what everything stands for. You see that there are
straight lines that connect each of the symbols together. Those
lines represent a wire.
is the Ammeter symbol.
is the Voltmeter symbol.
is the resistor symbol.
is the switch symbol.
is the battery symbol.
The important thing to
remember about this symbol is that the long bar on top represents
the positive terminal on a battery while the short bar on the
bottom represents the negative terminal.
Below is the actual circuit
made from the circuit diagram above. Pay close attention to see
how similar the diagram and the real circuit looks.
In the next sub-unit
you will be creating your own circuits from a circuit diagram
as you learn about what series and parallel circuits are. However,
before you do, there are two more symbols you will need to learn.
is the capacitor symbol.
A capacitor is used to
store electrical charge. An example would be a timer. We will
not use this symbol but note that this symbol is very common in
is the symbol for the light bulb.
diagrams are used to show how all the components connect
together to make a circuit.