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.
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 voltage then a piece of wire with a smaller resistance.
What factors are going to change?
The amount of current going through the wire will change as the length of the resistance wire changes in size. We will keep the voltage put out by the power pack the same. The readings on the voltmeter and ammeter will also change as the resistance wire is increased and decresed. It is inevitable with this experament that the voltage will cause the wires to heat up. Even though we can not controll this we keep the voltage at 2 volts so more heat can generate.
Results Table
Here are my results I took each one 3 times to get an average scare.
Voltage Current Length Of Wire
- 1.08 - 0.61 50 CM
- 1.08 - 0.61
- 1.09 - 0.59
.............................................................................
- 0.98 - 0.71 40 CM
- 0.97 - 0.72
- 0.97 - 0.73
............................................................................
- 0.84 - 0.87 30 CM
- 0.84 - 0.87
- 0.84 - 0.88
...........................................................................
- 0.73 - 1.00 20 CM
- 0.72 - 1.01
- 0.72 - 1.01
..........................................................................
- 0.48 - 1.31 10 CM
- 0.48 - 1.32
- 048 - 1.34
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