Physics Coursework- Ohms Law
Aim: To investigate the factors of affecting the resistance of a fit.
In this experiment I will be victimization a metal nichrome equip to show the resistance when the length and width is changed.
Variables
Variables that I am waiver to keep the same. Variables that I am going to change.
Width- 0.36mm2
Material- Nichrome wire
Voltage- 2V
Temperature- means Temperature        Â
Length- 10cm, 20 cm, 30cm, 40cm, 50cm
Material- Nichrome
Length- 50cm
Voltage- 2V
Temperature- Room Temperature        Â
Width- 0.36mm2, 0.32mm2, 0.24mm2, 0.16mm2, 0.12mm2, 0.08mm2
In this experiment I am going to use the nichrome wire as a theater director and I will be measuring the resistance by using an ammeter and a voltmeter because electricity tummy pass through the nichrome wire and the voltmeter will bewilder me the volts produced and the ammeter will give me the amps produce, therefore these readings can be used to find the resistance.
The resistance of a conductor is defined by the equation: R=V
I
Resistance = Potential disparity (Voltage)(V)
Current (amps)
Therefore I will be using this formula to give me the resistance, where the voltage divided by the current will bear upon the resistance.
Metals conduct electricity because the atoms in them do not deferral on to their electrons very well, and so creating free electrons, carrying a electronegative charge to jump along the line of atoms in a wire. Resistance is caused when these electrons flowing towards the positive terminal have to jumps atoms. So if we double the length of a wire, the number of atoms in the wire doubles, so the number of jumps double, so twice the amount of vigour is required: There are twice as some(prenominal) jumps if the wire is twice as long. The thinner the wire is the slight channels of...
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