My physics coursework will be based on the conduction of an
experiment. This experiment is about the resistance of different
lengths and the thickness of different wires.
The factors that I must consider whilst doing this coursework are:
thickness, length material, temperature, voltage and current. I will
only be varying the thickness, material, and length of the wires.
Three different types of thickness will be tested; these different
types of thickness will be tested separately. The length of the wires
will be controlled in 10 cm gaps, from 100-0cm, this will be done
three times 2 each wire. I will make sure that the current stays the
same. I’m doing this to keep it a fair test.
The equipment that I will use will be:
· 1 metre stick
· 1 metre length of wire
· 1 power pack (set to d.c. 0-13 volts)
· 1 voltmetre (0-5 volts) or (0-10 volts)
· 1 ammetre (0-14 amps)
· 1 variable resistor (0-16 ohms)
· 1 pair of crocodile clips
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The method in which I am going to take out this experiment is that for
a start I will set it up, and check that everything is ok, and running
as it should. Then I will begin monitoring the voltmetre taking my
results down on a rough piece of paper. From 100cm - 0cm, altering the
variable resistor as each step is taking place, this is make sure that
the resistance stays the same, making it a fair test. When I have
reached 0cm I then go back up again 100cm, and once I have done this I
will come back down again to 0cm, recording all of my findings. After
this I will change my wire for another one, and begin the test again.
I will do this for three different wires.
For safety I will ensure that:
· I conduct the experiment nowhere near water of any sort.
· I turn the power off after I take a reading; this is to make sure
that the wire doesn’t get too hot.
· I keep all of the wires separate, and not tangled or bare.
To make sure that I get as a curate results as I can possibly...