Electric Conductivity, Resistance and Ohm’s Law

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https://www.electronics-lab.com/article/electric-conductivity-resistance-and-ohms-law/

Introduction Consider a piece conductor in the shape of a cylinder with a voltage applied across its ends, as depicted in Figure 1. When a potential difference (voltage ∆V) is applied between two points in a conductor, an electric field E is created, and free electrons (e–) in the conductor feel a force due to the electric […]

Ohm’s Law

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https://www.electronics-lab.com/article/ohms-law/

Introduction The fundamental relation between the current, voltage, and resistance is known as Ohm’s law and is probably the most famous and elementary physical law of electronics. It is in 1827 when the German physicist Georg Simon Ohm publishes for the first time in the book “Die galvanische Kette, mathematisch bearbeitet” (in English: The mathematical […]

AC Resistance and Impedance

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https://www.electronics-lab.com/article/ac-resistance-impedance/

Introduction The electric resistance is a property that characterizes how a particular component creates an opposition to the flow of current when a voltage difference is applied to its terminals. In this tutorial, we will focus on the opposition that a resistor generates when an AC voltage is applied to it. In the very first […]