An Investigation on the Current of a Wire
Planning
--------
Aim:
In this investigation I aim to find out whether the length of a wire
affects the current of a wire.
Equipment List:
· Power Pack
· Wires (3 different thicknesses: thick, medium and thin)
· Crocodile clips
· Wooden board
· Ammeter
Method:
1. Set up a circuit with a battery and an ammeter as shown in the
diagram below.
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[IMAGE] = Battery cells
[IMAGE] = Crocodile clips
[IMAGE][IMAGE][IMAGE][IMAGE][IMAGE] = Ammeter
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2. Get a wooden board with three wires made of the same metal and of
the same total length but with different thicknesses; thick, medium
and thin.
Measurements
[IMAGE][IMAGE]0 10 20 30 40 50 60 70 80 90 100 In cm
wiresthick medium thin[IMAGE] Wooden
[IMAGE][IMAGE][IMAGE][IMAGE] Board
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3. Attach the circuit to each of the wires in turn using the crocodile
clips. Clip 1 will stay at the 0cm mark and clip 2 will move up the
wire at 10cm intervals.
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0 10 20 30 40 50 60 70 80 90 100
4. Each time I move the second crocodile clip I will record the number
on the ammeter telling me the strength of the current. I will repeat
this with the every wire; thick, medium and thin and then repeat the
whole experiment another two times. I will record my results in a
table and then also do an average results table.
5. I will then record my results in a table like this:
CURRENT (AMPS)
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Length (cm)
1
2
3
Preliminary Experiment
======================
I carried out a preliminary experiment to see the other factors that
could affect the experiment and also to see if I could improve any of