I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. I will then turn the power pack on and record what voltmeter and ammeter readings. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack.
Next, I will set the power pack on the lowest voltage possible to ensure that the current passing through the circuit isn't too high which could potentially affect the results because the wire would get too hot.
I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. I will then turn the power pack on and record what voltmeter and ammeter readings.
I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack. Again, I will record the voltmeter and ammeter readings and turn off the power pack. I will repeat this method every 5cm until I get up to cm, taking three readings from both the voltmeter and ammeter each time to ensure accuracy.
Apparatus Ensuring Accuracy To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading.
This will reduce the chance of false readings and will cancel out any anomalous results. I will also ensure that the wire does not heat up too much by confirming that I do not set the voltage too high on the power pack and by maintaining the same the voltage for every reading.
In addition, I will make sure I turn the power pack off after each reading. I will try to make this investigation as accurate as possible. Variables There are different variables that can be changed in this experiment; these are the independent variable.
However, due to my line of enquiry, I will only change the length of the wire. The variables I will control will be the type of wire resistivity and the cross-sectional area of the wire. I will also control, using the power pack, how many volts pass through the wire.
Below is a table illustrating the effect of changing the variables see Table 2: Variables Safety I will ensure experimental safety by confirming that all the wires are connected properly and that none of the insulation on the wires is worn. I will also ensure that there is a clear indication that the power is isolated by means of a switch and an L.
I will stand up during the investigation to ensure that I do not injure myself if something breaks. Results Below is a table of my results Table 3.
I have taken three reading and have worked out the average, shown in red. This confirms the first part of my prediction: In addition, my prediction that doubling the length of the wire increases the resistance by a factor of two is correct see Table 4.The length of the wire will be changed by moving the crocodile clip across the wire on a ruler.
The independent variable will be the length of the wire because that is what I will be changing/5(3). How the Length of a Wire Affects Its Resistance In my physics coursework I am going to investigate the effect of the length of a wire on its rutadeltambor.comance is the measure of how easy it is for current to flow through a rutadeltambor.comt is the rate of flow of charge through a conductor, and it is measured in amps using an ammeter.
To help me plan my investigation I have completed a. Factors Affecting The Resistance Of Wire Aim: To investigate the factors that affect the resistance in a conductor. The main factors that affect the resistance in a conductor are: · Length · Temperature · Cross sectional area · Material · Magnetism The factor that we are going to change is the cross sectional area.
Investigating Resistance. 0. Free Essays.
Investigate the factors that affect the resistance of a wire. In this experiment, I will be investigating how the length of a wire affects its resistance. HYPOTHESIS. My hypothesis is: The greater the length of wire, the higher the resistance. Apr 19, · For example, when the length of the wire is 20cm the resistance is ohms; when the length of the wire is 40cm the resistance is ohms, which is roughly double.
In my main investigation I will see if this observation applies to my rutadeltambor.coms: Essay about Investigating the Factors that Affect the Resistance of a Wire - Investigating the Factors that Affect the Resistance of a Wire Aim: My aim is to find out how the length affects the resistance of a wire.