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Physics - Resistivity
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| Words: 3596
| Submitted: Fri Apr 25 2008
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PHYSICS AIM The aim of the experiment I am conducting is to find the resistivity of a 24 watt light bulb. This will be conducted through a series of experiments which will be followed by some calculations using formulas such as: Or ? is the resistivity (measured in ohm metres, ?-m) R is the electrical resistance of the material (measured in ohms,?) is the length of the piece of material (measured in metres, m) A is the cross-sectional area of the material (measured in square metres, mē). There are other equations that could be used to work out electrical resistivity, such as: E is the magnitude of the electric field (measured in volts per metre, V/m); J is the magnitude of the current density (measured in amperes per square metre, A/mē). Finally, electrical resistivity is also defined as the inverse of the conductivity ? (sigma), of the material, or: Electrical conductivity or is a measure of a material's ability...
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