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Factors Affecting the Resistance of a Wire.
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
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Factors affecting the resistance of a wire. Aim: to find out if and how the length of a wire affects the resistance of a wire. Theory: Resistance is anything in a circuit that restricts the flow of electrons. It doesn't slow them down. As the electrons pass through a wire or component energy has to be lost. Above is a piece of wire with its atoms and electrons passing through it. When the electrons hit the particles in the conductor, they transfer some of the energy to the particles on the conductor this causes them to vibrate faster therefore the conductor heats up. Ohms Law is when a conductor is kept at a constant temperature the current flowing through the conductor is directly proportional to the P.D. (potential difference) across its ends. Resistance is calculated by dividing the voltage by the current. This triangle shows how to work out Resistance in ohms V = R I It also...
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