Aim: In this investigation I want to find out how the length of a wire affects the resistance. Resistance: is a force that resists the flow of the current in a wire. Resistance = Voltage / Current R = V I Factors: The factors I think that will affect what happens in the investigation are: 1. The thickness of the wire.
2. The length of the wire. 3. Whether or not it is a good conductor. 4. The temperature of the wire.
A Fair Test: To keep the investigation a fair test I will only change one factor at a time, the factors I will keep the same are: 1. The voltage (p. d) 2. The same type of wire (nichrome) 3.
The same thickness of wire. 4. The same current. The one factor I will vary is the length of wire.
Prediction: I predict that as the length of the wire increases, so will the resistance. I think this because in a longer wire, there are more wire particles that electrons can bump into. Resistance is caused by electrons colliding with wire particles. Therefore, if there are more wire particles, there is a greater chance of an electron colliding with a wire particle. Also, the current flowing in a wire is proportional to the P.
d across it. Apparatus: o Power Supply o Wires o Metre stick o Light bulb o Sellotape voltmeter ammeter o Crocodile Clips nichrome Wire Method: I will first of all carry out the practical work I am required to do for this investigation. I will set up the circuit (see Diagram) with a Voltmeter and a Ammeter connected. I set it up by: getting the metre stick and measuring out 100 cm of nichrome and sticking it down to the stick.
The Term Paper on Length Of The Wire Resistance Current Results
... investigate how the electrical resistance of a wire is affected in relationship to the length of that wire Factors affecting resistance these include: . ... Even though I have been able to conclude my investigation I feel it is still important to address ... charged particles make with fixed particles also increases and therefore the value for the resistance of the wire becomes higher. Resistance, in ...
Then I clipped two crocodile clips, one on each side then connected in the Voltmeter and Ammeter using wires which I plugged into the power pack / supply which was plugged into the mains. Starting at 100 cm of nichrome I will work down to 10 cm and at every 10 cm I will take five readings from the Voltmeter and Ammeter. I put the results in a table (see Results) and using them I worked out resistance for each reading using the formula R = V / I and then an average. Using the average resistance readings I drew a graph (see Results).
Measurements: The things I will have to measure are: the Volts and Amps and on each interval I take to take a reading I will have to take 5 readings of each Volts and Amps, so I can work out the resistance, then I will have 5 resistance readings from this is I will work out an average resistance.
Also I will also be measuring the wire from 100 cm down to 10 cm. Diagram: This is how I will set up my circuit:.
