Resistance is the measure of how easy it is for current to flow through a wire. This is because the current and electrons will have more wire to pass through so the resistance will be high, whereas when there is less wire, the current can flow through easier, having a lower resistance. This means Resistance equals voltage divided by current. To support my prediction and conclusion, I could do further experiments. The equation representing the dependency of the resistance R of a cylindrically shaped conductor e. There are no anomalous results that I would consider to be far away from the line of best fit. The line of best fit on the graph shows that almost all the points were touching the line.
Some parents are more lenient, some strict, and some are absent entirely. Plastic is an example of an insulator. This is the cause of resistance and where electrical energy is turned into heat energy. In a short tube, there are less atoms which means there are less to deflect the electron any more speeding the speed up. If the outermost shell or sub-shell with transition metals is less than half full then the atom is willing to let those electrons wander and the material is a conductor.
For situations dealing with alternating currents, capacitance becomes an issue - as there is a current flow as the electric field fluctuates, but just as before - the dielectric constant is not a factor in a component's resistance. This is based on our preliminary work on how the thickness of wire affects resistance. Metals are good conductors so have lower resistance than an insulator of the. The elec-trons in an insulator are in a fixed position, this means that there is no electric current flowing. On the other hand, more repeats could have made the data less accurate due to almost all the results being slightly inaccurate. I know this because I didn't get any individual anomalous results, meaning that I was able to use all of the results obtained in my averages from the two experiments.
Different equipment can lead to different results. A 20-Amp circuit used for wall receptacles should be wired using 12-gauge wire and a 15-Amp circuit used for lighting and fan circuits should be wired using 14-gauge wire. Middle Resisitance is measured in omegas Ω. The potential difference or voltage. The free electrons keep bumping into atoms.
To provide a larger current, several cells may be connected in series end to end. I predict that the longer the wire, the higher resistance will be. Higher R leads to a need for a higher voltage to hit specified current levels. The resistance of an object is a measure of the how reluctant current is to flow through that object. I tried to make my results as accurate as possible by firstly, making sure that it was a fair test as stated earlier in the coursework. This would have prevented the area of the wire from remaining constant and would have affected my results.
Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire. Thus, 12-gauge wire has a wider cross section than 14-gauge wire. In this investigation, we are investigating how the length of wire affects resistance current and voltage. The factor I chose was length. If the length of the wire is increased the cross section of wire also have be increased accordingly to check the increase in the resistance. There are a few factors that affect how much resistance electricity encounters, including the width of the wire, the wire material and the length of the wire.
This is because it will give a direct current. This is directly proportional, since when the wire is doubled the resistance is too. Basic: The larger the diameter the less resistance. Most errors in my experiment were encountered in the measuring of the wire. When there is no voltage applied electrons move randomly throughout the material. This is shown by my tables as the length of wire increases, the resistance also increases. The potential difference across the components and the current through them , are carefully controlled by the resistance in each part of the circuit: The relationship between potential difference, current and resistance was discovered by a German physicist, George Ohm, in 1826.
This also meant that they were easy to move about on the wire changing the length of it. This means the resistance will increase when there are more atoms in the way; the atoms collide with the free electrons. . The correct term for this 'electric slope' is the potential gradient. Mostly the experiment was a success.
This means I can find and record the resistance. § I should be careful when cutting the wire. Thus, 12-gauge wire can safely support a circuit that uses an appliance drawing up to 20 Amps of current. This will work out the resistance in ohms. Prediction: I predict that when you increase the length of the resistance wire the resistance will increase.
I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack. The vibrating atoms having gained this kinetic energy now vibrate more. Energy has to be spent to force electrons through it. I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. So only length is not important cross section of the wire is also an important factor. I am working in a Group of 4 including myself and working in a team together should help us get an accurate output. This can be applied in the variables of resistance.