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How do the dimensions of a wire effect its resistance?
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How do the dimensions of a wire effect its resistance? Physics Electricity is conducted through a conductor by means of free electrons. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. it has less resistance. The free electrons are given energy and as a result move and collide with neighbouring free electrons. This happens across the length of the wire and electricity is conducted. Resistance is the result of energy loss as heat. It involves collisions between the free electrons and particles of the metal. These collisions convert some of the energy that the free electrons are carrying into heat. How is it measured? The resistance of a length of wire is calculated by measuring the current in the circuit (in series) and the voltage across the wire (in parallel). V = I * R where V = Voltage, I = Current and...
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