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Factors affecting the resistance of a wire.
Member rating: No Rating | Words: | Submitted: Mon Dec 15 2003
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Factors affecting the resistance of a wire Introduction: Resistance is a force, which opposes the flow of an electric current around a circuit. Resistance is measured in Ohms. George Ohm discovered that a circuit sometimes resists the flow of electricity. He called this 'RESISTANCE.' He even came up with a rule for working out the resistance of a circuit, which was: R= V ÷ I V- Volts I- Current R- Resistance Ohms law says the more resistance means more energy is needed for the current to pass through the wire. Resistance is a measure of how much energy is needed to push the current through something. Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire. These collisions slow down the flow of electrons causing resistance. THE FOUR FACTORS THAT AFFECT THE RESISTNCE OF A WIRE ARE: 1. LENGTH OF WIRE 2. THICKNESS OF WIRE...
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