Cicuits

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  • Created by: Tahir77
  • Created on: 16-11-15 18:58

Circuits 

ircuit symbols

We use circuit symbols to draw diagrams of electrical circuits, with straight lines to show the wires. The diagram shows some common circuit symbols.

Switch - two circles connected by a line. If the line connects the circles, the switch is closed. If it is only connected to one circle the switch is open. A cell - two vertical lines, one thin and one shorter and thicker. A battery - two cells connected by a dotted line. A lamp - a circle with a cross in it. A voltmeter - a letter V inside a circle. An ammeter - a letter A inside a circle. A resistor - a rectangle. A variable resistor - a rectangle with an arrow through it at 45 degrees. A motor - a letter M inside a circle. (http://www.bbc.co.uk/staticarchive/5ecbda8efd041c859385f0a8005720b587931759.gif)

Cells and batteries

Notice the difference between the symbol for a cell and the symbol for abattery? The battery is made from joining cell symbols together.

Think of what we usually call a single battery, like the type you put in a torch. In physics, each of these is actually called a cell - it is only when you have two…

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