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Resistance Questions and Answers (Q&A)

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Due to the wires having electrical opposition, which means that they resist the movement of electrons, the electrons bump into atoms on the outside of the wire, and their kinetic energy is given to the atoms as thermal energy. This thermal energy causes the wires to heat up. A higher curr...Read More

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As temperature rises, the number of photons increases and with it the photons will collide. When the temperature rises, the resistance increases. For some materials, resistivity or ohmic resistance is a linear function of temperature. The resistivity of a conductor rises with temperature....Read More

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Resistance is an abstract used for DC (direct currents) whereas impedance is AC or an alternating current parallel. Resistance is due to electrons in the conductor clashing with the ionic lattice of the conductor meaning that electrical energy is transformed into heat. Impedance is a more...Read More

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Those power lines have a non zero resistance and therefore are subject to Joule heating, which causes transmission loss. The split of power between transmission losses and load energy conveyed to the client can be equated by a voltage partitioner. To minimize transmission losses, the resistance...Read More

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Fixed resistors are made of carbon encased in a plastic cylinder, with a connecting wire on either end. Most resistors used in electrons today are carbon resistors. Older resistors were made of poorly conducting metal, to restrict the flow of the charge. A resistor will limit the electr...Read More

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There is a resistance to the flow of an electric current through most conductors. The resistance in a wire increases and the thickness of the wire decreases. By increasing the length, the resistance can be increased. When you increase the excitation by increasing temperature, the resistance...Read More

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The ohmic resistance value of a specific substance is a material constant, and unlike resistance, is independent of the dimensions of the sample. Good conductors, such as gold, hold many electrons which are not bent. These are called free electrons. Charge moves more readily through some...Read More

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