An Investigation Into the Resistance of a Wire - GCSE Physics Coursework
Bur we can also measure resistance in a circuit using a voltmeter and ammeter. The best essay writers are ready to impress your teacher.
Make an order now! In order to explain anything, to another person, we use examples, or models. In the same way, I will make use of two to three examples, or models, to help prove my experiments. One such model is the water model. Here, the water acts as the electrons, the pump as the battery, and the pipe, as the wire. If water tub is stored at a higher altitude, the water pressure increases, and so the water flow faster. As diameter of the pipe increases, the amount of water flowing through increases.
Thus I predict, that the width of a pipe affects the resistance of a wire. When the length of the pipe is increase, the water takes more time to pass through, and so takes more time. Thus I predict that length affects the resistance of a wire. Also, when the power of the pump increases, the water travels quicker, so I predict that potential difference, affects resistance.
There are many factors, that affect the resistance of a conductor, and it is these factors, that I will be examining in the coursework. They are: 1. In order to experiment and to see if these factors actually affect the resistance, we test using two to three variables of each factor, BUT at the same time, keeping the other factors the same.
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When we increase the thickness, there is more electron space, as the width increases, so the electrons have fewer collisions. We are able to see this, also in my model, where if we increase the dance floor space, the people dancing are spread even more evenly, and far apart, and so the man has fewer collisions. Also in the circuit, following this explanation. It is possible to see, that if we increase the width, then there is more space for the electron to pass through, with fewer collisions.
Thus I presume that when you increase thickness, resistance decreases. When we increase the length, the possibility of a collision, increases, which is also viewable in my model, where if we increase the length of the dance floor, the chance that the man will collide increases, as he has a longer way to walk. In the circuit, we can see that if the wire length is longer, then the possibility of more collisions increases. Thus I presume that when you increase the length, resistance increases.
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