The resistance of a typical conducting wire is low when temperature is low and high when temperature is high. The increase in resistance alongside temperature is due to an increase in energy of the wire atoms, which cause them to vibrate more and impede the path of the electrons flowing through.
Continue ReadingA good example of resistance changing with respect to temperature is a standard light bulb. At first, while it is completely cool, very little light is produced. As the filament heats up, the resistance increases, which in turn produces more heat and more light. If temperatures are low enough, certain materials can approach zero resistance, called superconductors.
Learn more about ElectricityThe three formulas associated with Ohm’s law are the equations that demonstrate the relationships between voltage, current and resistance and follow from the formula for determining voltage by multiplying current by resistance. Knowing any two of these variables enables the calculation of the third unknown variable.
Full Answer >Electrical currents always follow the path of least resistance. They require three conditions in order to flow: a difference in voltage between two points, a conductive path and a closed circuit. When these conditions are met, current flows from the higher voltage point to the lower point.
Full Answer >A resistor is a little package of resistance used to reduce the current in an electric circuit by a certain amount. It is a small component that has connectors on both sides that allow it to connect to a circuit.
Full Answer >When a short circuit occurs, electrical current experiences little to no resistance because its path has been diverted from its normal direction of flow. This in turn produces excess heat and can damage or destroy an electrical appliance. It can also create a fire hazard and an electrical shock hazard if left unattended
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