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Dc Circuits And Ohm s Law Video

Track My Order. Frequently Asked Questions. International Shipping Info. Send Email. Mon-Fri, 9am to 12pm and 1pm to 5pm U. Mountain Time:. When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance.

These are the three basic building blocks required to manipulate and utilize electricity. At first, these concepts can be difficult to understand because we cannot "see" them.

One cannot see with the naked eye the energy flowing through a wire or the voltage of a battery sitting on a table. Even the lightning in the sky, while visible, is not truly the energy exchange happening from the clouds to the earth, but a reaction in the air to the energy passing Dc Circuits And Ohm s Law it. In order to detect this energy transfer, we must use measurement tools such as multimeters, spectrum analyzers, and oscilloscopes to visualize what is happening with the charge in a system. Fear not, however, this tutorial will give you the basic understanding of voltage, current, and resistance and how the three relate to each other. Electricity is the movement of electrons. Electrons create charge, which we can harness to do work.

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Your lightbulb, your stereo, your phone, etc. They all operate using the same basic power source: the movement of electrons. The three basic principles for this tutorial can be explained using electrons, or more specifically, the charge they create:. So, when we talk about these values, we're really describing the movement of charge, and thus, the behavior of electrons. A Ciruits is a closed loop that allows charge to move from one place to another. Components in the circuit allow us to control this charge and use it to do work. Georg Ohm was a Bavarian scientist who studied electricity. Ohm starts by describing a unit of resistance that is defined by current and voltage.

So, let's start with voltage and go from there. We define voltage as the amount of potential energy between two points on a circuit. One point has more charge than another.

The Concept of Electrical Polarity

This difference in charge between the two points is called voltage. It is measured in volts, which, technically, is the potential energy difference between two points that will impart one joule of energy per coulomb of charge that passes through it don't panic if this makes no sense, all will be explained. The unit "volt" is named after the Italian physicist Alessandro Volta who invented what is considered the first chemical battery.]