Length of wire and resistance coursework

All conductors of electricity, including wires, impose some resistance to the flow of electricity. One effect of this resistance, also called impedance, is a loss of voltage. This is known as voltage drop and is represented as a percentage of the total voltage supplied at the power source of the circuit. If you measure the voltage of a circuit at the service panel (breaker box), you should get a reading of around 120 volts (for a standard circuit). If you take another measurement of the circuit at the farthest device from the panel and get a reading of 114 volts—a difference of 6 volts—that circuit has a 5% voltage drop (5% of 120 = 6). Excessive voltage drop means that motors, appliances, and other devices don't run as fast or efficiently as they are designed to. This can lead to decreased performance, unnecessary wear, and even premature failure of electrical equipment.

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Length of wire and resistance coursework

length of wire and resistance coursework

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