Investigating the Resistance in Veriuos Lengths of Wire

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


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...