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Resistance Questions and Answers (Q&A)

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 current for a given voltage means a lower resistance. The thicker wire has a lower resistance than the thinner wire. The resistance of a wire decreases with increasing thickness. Current through a wire causes power loss from the wire resistance. They resist the motion of the electrons.

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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. Resistivity and conductivity are reciprocals. The scattering of electrons determines ohmic resistance. The more the dispersion, the higher the resistance.

Resistivity increases within increasing temperature in conductors and decreases with increasing temperature in insulators. The temperature dependence of resistivity can only be understood with a quantum mechanics. The deflection or scattering of electrons with phonos is a source of resistance. When the temperature goes up resistance goes up.

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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 common term for resistance that also includes reactance.

Impedance is the total contribution of both resistance and reactance. Impedance and reactance are each given in units of ohms just like resistance. The idea of impedance allows for many of these things to be condensed so that they are easier to communicate. Resistance measures the opposition to a flow of current. Impedance is the combination of resistive element and reactive element.

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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 of lives has to be as small as possible, compared to the load.

Line resistance and power supply specifications of consumer appliances are fixed. Joule heating is what happens when a current runs through anything that has resistance. Joule heating also depends upon the amount of current resistance and conducting wire.

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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 electric current flowing through a circuit and resistance is the curtailment of the flow. Within a resistor, the energy of the electrons that flow through the resistor is charged to heat and light. There are many different types of resistors. They are all made the same with a resistance material encased in a non-conductive material casing, such as plastic, cylinder, with a connecting wire on either end.

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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 increases.

If resistance happens as the result of the collision between charge carriers and the atoms of the wire, and then there is likely to be more collisions in a longer wire. More collisions mean more resistance. Also, the cross-sectional region of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area. Also, the material the wire is made of affects resistance.

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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 material than through others.

The resistance of a specimen is a quantification of how much the sample obstructs the flow of electrons through it. The type of substance within a resistor and it’s physical dimensions and some of the factors which determine it's resistance.

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