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Starting electronics
Figure 4.5 A breadboard layout for the circuit in Figure 4.4
Getting results
As well as watching what happens when the circuit is switched
on, you should make a record of the voltages displayed by
the meter, every few seconds. To help you do this a blank
table of results is given in Table 4.1. All you have to do is fill
in the voltages you have measured, at the times given, into
the table at successive measurement points. You’ll find that
the voltage increases from zero as you switch the circuit on,
rapidly at first but slowing down to a snail’s pace at the end.
Don’t worry if your measurements of time and voltage aren’t
too accurate — we’re only trying to prove the principle of the
experiment, not the exact details. Besides, if you switch off
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