A wiring sketch of a real battery and lamp looks different in every book. So physicists draw circuits with standard symbols: one agreed mark for each component. Here is one circuit drawn that way, with each symbol picked out in turn.
Start with the source. One long thin line beside one short thick line is a cell: a single source. The long thin line is the positive terminal.
Two long-and-short pairs drawn together are a battery: two or more cells joined end to end. One pair is a cell; two pairs are a battery.
Which component is highlighted in the diagram?
A gap in the wire with an angled lever is a switch.
A plain rectangle is a resistor.
A circle with a cross inside is a lamp.
A circle with a letter inside is a meter: A for an ammeter, V for a voltmeter. The plain lines joining the symbols are the wires.
In a circuit diagram, a circle with the letter A sits in the loop. Which component is it?
Write down the fact:
A circle with a letter inside is a meter.
The letter A marks an ammeter.
The symbol is an ammeter.
Which component is highlighted in the diagram?
Which component is highlighted in the diagram?
A circuit symbol is a circle with a cross inside. Which component is it?
A diagram's source is drawn as a single long-and-short line pair. Is the source a cell or a battery?
Write down the fact:
One long-and-short pair is a cell.
A battery is drawn as two or more pairs.
The source is a cell.
A symbol shows one long line beside one short thick line. Which component is it?
The voltage across a lamp is to be measured. Which circuit symbol stands for the instrument used?
Which component is highlighted in the diagram?
Which description matches the battery symbol?
Which component is highlighted in the diagram?