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factors affecting the resistance of wire conductivity
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resistance in wire depends on
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The Resistance of a Wire
Introduction:
In this piece of coursework, I have been finding out factors that
affect the resistance of a wire. Firstly, I will explain how
resistance works. Resistance is when electrons in a wire collide with
atoms also in the wire. When the electrons and the atoms collide the
electrons start to move slower, which then causes resistance. So,
resistance is how hard it is to move electrons through a wire.
Now, I am going to tell you what are the factors of wire resistance.
Number one, temperature is a factor. If the wire is heated, then the
atoms will move around more because there will be a rise in energy.
This is good because it will cause more collisions between the atoms
and the electrons. The increase in collisions would obviously cause
the resistance to rise.
Secondly, the length of the wire is a factor. The longer the wire, the
longer it will take electrons to get to the end of the wire. This is
because there will be more collisions between electrons and atoms. So,
the length of the wire should be directly measured to the resistance
if not then there will be fewer collisions.
This would be very easy to do, and give accurate results. Because of
the length being measured to the resistance, I could find the length
of the wire with the resistance of the wire, which would make my graph
more effective.
Due to the effectiveness of this way, I have agreed to use the length
of the wire as the factor because I think it will be most accurate and
easier for me.
Prediction:
I predict that, the longer the wire is, the more resistance there will
be due to more collisions between the electrons and atoms. The length
of the wire should be the same as the resistance. If the wire is
doubled, then so will the resistance. If the length is twice as much,
then there will be twice as much collision, which would increase the
I also decided to use a wooden block to keep hold of the wire, because
C. As current is supplied to the coil a voltage is generated in the iron rod. When the current is cut off there is no voltage created.
From this I can tell I can use 3 volts and resistance wire that is
have to be across the wire and not just anywhere in the circuit so it
These are called ohmic or liner conductors and since I V, it follows that V / I = constant. The resistance of an ohmic conductor therefore does not change when the voltage does.
there will be. So if the length of the wire were to double, so would
V is voltage in volts and I is current in amperes. L:- is the length
50cm for us. The current will be kept on the same level using the same
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.
Relationship Between the Resistance and the Length of a Wire Aim: To find the relationship between the resistance of the wire and
F This was repeated 10 times in all, each time, an extra wire of exact
An Investigation into the Relationship Between the Resistance of a Wire and Its Diameter and Length
Investigating the Factors that Affect the Resistance of a Wire. Aim To study the factors that affect the resistance of a wire. Background Information Current and potential differences measure different things. they are related to each other.
Investigating the Relationship Between the Length of a Wire and Its Resistance Aim: To find the relationship between the length of a wire and it’s resistance. Planning: We conducted a preliminary experiment to help us conduct the real experiment. In this preliminary experiment we aimed to find out what thickness and type of wire would be suitable for the experiment, and what range of lengths of wire and range of voltages and currents would be suitable for measuring. We discovered that at too great a voltages and too short a length, the wire became very hot. One time it melted, in a way similar to a fuse, because of the hot temperature, but this was only when we tested a length of 2cm.
of the atoms, so if there are more or larger atoms then there must be