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How does the length of wire affect resistance
Resistance of a wire experiment conclusion
How does the length of wire affect resistance
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The Resistance of a Wire Investigation
Aim: To investigate how changing the length of a wire affects the
resistance.
Prediction: I predict that the longer the piece of wire, the greater
the resistance will be. This is because the current is resisted by the
atoms in the wire. In a longer piece of wire, there would be more
atoms for the electrons to collide with and so the resistance would be
greater. The shorter piece of wire will have less resistance because
their will be less particles causing less collision.
I also predict that the length of the wire and the resistance will be
directly proportional.
Plan: In this investigation a simple circuit will be set up to read
the voltage and current when the length of the wire changes. The
length will range from 10cm - 100cm with intervals of 10cm. The length
of the wire will be changed by moving the crocodile clip across the
wire on a ruler.
We did preliminary tests to ensure that the wire did not get too hot,
If the wire got too hot, energy would be given off as heat.
The circuit should be set up as in the circuit diagram. It is
important that the voltmeter is set up in parallel and the ammeter in
series. The readings from the ammeter and voltmeter will be used to
work out the resistance.
Hypothesis: many different things can effect the resistance of a wire.
Diameter: A small diameter will have a small surface area creating
more resistance. A large diameter will allow the current to pass more
freely with less resistance.
Length: The of the wire will also affect the resistance. If the wire
is long their will be a higher resistance because their will be more
particles for the current to pass.
Fair Test: To ensure that the investigation is carried out in a fair
way and that the results will be accurate and reliable a number of
things must be followed. The only variable in the test will be the
I also decided to use a wooden block to keep hold of the wire, because
Varying the surface area A larger surface area will result in the number of particles to increase so there will be a higher chance of a collision increasing the rate of reaction , so the reactant broke into smaller pieces would react faster oppose to larger pieces. Varying the temperature An increased temperature will increase the speed of the particle
5. Put the stirring wire through the second hole of the stopper. Insert the stopper, thermometer, and wire into the test tube. Make sure that the thermometer bulb is below the surface of the solution.
By adding fresh cold water it should cool the copper calorimeter. By making sure I do these checks before I do the experiment means that I should be able to get accurate results as the test will have been run fairly and hopefully successfully as there should not have been anything gone wrong. To make sure all the measurements are correct, I will also run checks. These checks when recording the data are. Make sure to check the thermometer to see what temperature the water is at the start, so I am able to see what it has to be when its been heated by 10 degrees.
* Surface Area - if one reactant has more surface area there is greater chance of a successful collision as there is more area for the reaction to occur on. * Catalysts - a catalyst is a chemical that speeds up a reaction without changing itself during the reaction. An example of this is an enzyme. In this investigation however I am only going to investigate how concentration affects rate of reaction as the other methods of increasing the rate of reaction are not easily controlled and I do not know of a catalyst that will speed up the reaction.
The purpose of performing this lab was to find the specific heat capacity of an unknown metal.
equation V = IR. V - volts, I - current and R - resistance. I plotted
Quickly and carefully transfer the heated metal from the test tube to the water in the calorimeter.
of the atoms, so if there are more or larger atoms then there must be
The Wire is structured both horizontally and vertically, from the foot soldiers of the drug trade, through the school system, newspapers, police department to the higher executives in charge of everything, which shows the parallel and prevailing problems that plague all of society. The show provides a viewer with an insight into the steep decline in social order, in which cops, politicians, teachers, workers and criminals are surrounded by the corrupting forces that overwhelm them all. The Wire tells a story that compares to current social conditions, it deals with the basic realities and inequalities of our world. It is a drama about politics, sociology and economics. The drama is told in the space ‘wedged between two competing American myths’ (Simon, 2004). The first myth is a story of the American Dream that says if you are smart and work hard you will succeed. The second myth is that of rags-to-riches tale that says if you are cunning enough to build yourself a better life than those around you, you will succeed beyond your wildest dreams. Simon wrote The Wire because he felt it was ‘no longer possible even to remain polite on this subject. It is a lie’ (Simon, 2004). The ‘intricate and interwoven storylines dramatise the dialectic interactions of individual aspirations and institutional dynamics’ (Sheehan, Sweeney, 2009). Every character and every story line combine to create a view, not just of Baltimore, but of ‘Everycity’, highlighting the existence of capitalism, which affects us all. While the show itself does not name the system of capitalism it exists within, the metanarrative does so with extreme clarity and force. The drama repeatedly cuts from the top of Baltimore’s social structure to its bottom; from political fu...
Investigating the Effect the Thickness of a Wire has on Its Resistance. Equipment:.. Nickel Wire cut into 10 pieces of 30cm length (Ruler, Pliers). Two crocodile clips Five Pieces of Wire Power Source Variable Resistor Ammeter Volt Meter Method: The.. =
Factors Affecting the Resistance of a Wire The aim of this experiment is to investigate one factor that affect the resistance of a wire. I will do this by performing an experiment. First I will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has.
The Relationship Between Length, Width and Resistance of a Wire Aim: To investigate how the length and width of a wire affects the resistance of the wires. What is the resistance to a s Electricity is conducted through a conductor, in this case wire, by means of free electrons. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. gold has less resistance to the sand. For example, gold has more free electrons than. iron and, as a result, it is a better conductor.
V(voltage) I (current) Therefore, I = V R Therefore, if V is constant, in order to increase I, R must decrease.
Additionally, it is important to take into account the type of cables, current carrying capacity as well as other conditions such as temperature rating of the cable insulation. The electrician should use the charts to find out the number of conductors allowed to run through the pipe.