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Factors affecting the resistance of a metal wire.
Member rating: No Rating | Words: | Submitted: Mon Nov 17 2003
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Physics Investigation Factors affecting the resistance of a metal wire Planning I have been asked to consider the factors affecting the resistance of a metal wire. Resistance opposes the flow of an electric current around a circuit. So that energy is required to push the charged particles around the circuit. Resistance would occur when the electrons travelling along the wire collide with the atoms of the wire, causing the flow of electrons to slow. I will find out the resistance, using the equation: Resistance (?) = Voltage (V) Current (A) The key factors that will affect the resistance of a metal wire are: Material Temperature Thickness Length Trial Results Material Thickness (mm) Length (cm) Current (A) Voltage (V) Resistance (?) Nichrome 0.274 10 0.100 0.19 1.9 0.274 10 0.150 0.3 2 0.274 100 0.100 1.9 19 0.274 100 0.150 2.86 19.1 Copper 0.274 10 0.100 0.03 0.3 0.274 10 0.150 0.05 0.33 0.274 100 0.100 0.06 0.6 0.274 100 0.150 0.05 0.33 From my results, I can see that the Nichrome wire will be best for my experiment. It has matched my expectations with the ten times theory. The copper wire seemed very inappropriate, as two of the results came out to be the same, although in...
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