Factors that Affect the Amount of Voltage in a Wire
We are going to find out what factors affect the ammount of voltage in
a wire.
Theory
As soon as we turn on the power pack electrons are being forced
through the wire. If we increase the voltage on the power pack this
generates more heat in the wires but this can not be controlled. If
the resistance wire is long it will take longer for the electrons to
pass through. Just like if you were trying to run round a running
track and sombody was holding you back. It would take longer for you
to do one lap if the coarse was very long. If the coarse was not very
long you would do it in a much faster time.
Therefor the longer the resistance wire the higher the resistance.
Apparatus
· 1 Power Pack
· 1 Volt Meter
· 2 Crocodile Clips
· 6 Insoluated wires
· A piece of resistance wire 50 cantermeters in length
· 1 Ammeter
Plan
The first thing to do is to collect all the pieces of apparatus on the
list and setup the experament as shown. Turn on the power pack and set
it to 2
volts. Look at the reading on the voltmeter and ammeter then write
them down. Turn off the power pack and wait for a few seconds . Do
this 3 times this will allow us to calculate a average. Then reduce
the crocodile clips on the resistance wire by 10 centermeters and turn
on the power pack again. Look at the readings on the volt meter and
ammeter and repeat this step again. Carry on doing it untill the
amount of resistance wire reaches 10 centermeters.
[IMAGE]
his diagram shows how i will setup the equipment
Prediction
As we change the length of the resistance wire the amount of current
flowing through the wire the will decrease. I expect the reading of a
longer piece of wire to have a lower
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