Investigating Resistance in a Wire
The opposition is the name inclined to the tendency for a telegram to oppose the movement of the electrons passage through it. The great the resistance the electrons occur the to a greater extent voltage is needed to propel the current through the fit. Resistance is define by the following equation:
Resistance R= p.d across the telegram (V)
                Current through the wire (I)
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Key Factors
There are many factors to be considered which can effect the resistance of a wire these accommodate temperature, current, oppressiveness of wire and the duration of the wire. The temperature leave behind affect the resistance because as the temperature rises the atoms in the wire will begin to tickle more meaning they will charm I the expressive style of liberation electrons. The problem with this method is that it tricky to vary the temperature of the wire and keep it at the same constant temperature. The current will effect the resistance because more electrons will be passing through the wire so if collisions do occur with atoms in the wire lots of the electrons will still get through.
The thickness of the wire will affect the resistance because in a thick wire opposed to the thin wire in that location is more space for the electrons to move in thus trim down the amount of collisions and the resistance. Though this is good method it is hard to make different thickness of the same wire easily. The length of wire will effect the resistance in a equivalent way the thickness but the longer the wire the greater the resistance because there will be more of a chance for the electrons and atoms to clash as there are more atoms in the longer wire thus making the length of wire proportional to the increase in resistance.
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