resistance of a wire

Aim: To investigate how changing the length of the outfit affects its rampart.

What is defense?

Electricity passes through a material which is a conductor. In this experiment I will be using a conducting wire. A better conductor is a material which has a lot of costless electrons. For example silver has more handsome electrons than iron and therefore is a better conductor. The electrons ar presumption energy and begin to move and collide with neighboring shift electrons. This happens across the length of the wire and electricity is conducted.
Resistance involves the collisions amongst the free electrons and fixed particles of the metal. These collisions convert some energy that the free electrons ar carrying into heat.


Factors:

Factors are things which will affect the experiment. There are many factors to consider during this experiment; below I lead compiled a list of these factors:


The cross-sectional playing field The cross-sectional area is the diam of the wire the thickness of the wire. Cross-sectional area measures from hotshot side straight to the other side. Resistance decreases as the diameter of the wire increases. The resistance of the wire decreases because there is more blank shell for the electrons to move.



In comparison resistance increases as the diameter of the wire decreases because there is less space for the electrons to move around in, they are compacted. This shows that cross-sectional area has to be taken into consideration when seek to find out weather the length of a wire affects resistance.

length - The length of the wire is another factor which affects the resistance. Length and resistance are always in proportion, as one and only(a) increase so does the other they both increase by the same amount. This means that if the length of the wire was to increase the resistance would increase as. This rule also applies if you were to decrease the length of the wire the resistance would also decrease; this is due to the movement of electrons.

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