# Power current voltage resistance relationship goals DC Circuit Theory. The fundamental relationship between voltage, current and resistance in an electrical or electronic circuit is called Ohm’s Law. Then all basic electrical or electronic circuits consist of three separate but very much related electrical quantities called. Learning Objectives. By the end of This equation is based on the conservation of energy and conservation of charge. Electrical Example 1. Calculating Resistance, Current, Voltage Drop, and Power Dissipation: Analysis of a Series Circuit. Our goal is to create rapid prototypes and give small-batch manufacture How electrical charge relates to voltage, current, and resistance. . More specifically, Ohm's law states that the R in this relation is constant, independent of the current. Copper, gold, silver, and aluminum are good conductors. There are also poor conductors. Tungsten—a metal used for light bulb filaments—and carbon—in diamond form—are relatively poor conductors because their electrons are less prone to move. Insulators are materials whose outer electrons are tightly bound to their nuclei. Modest electric forces are not able to pull these electrons free.

When an electric force is applied, the electron clouds around the atom stretch and deform in response to the force, but the electrons do not depart. Glass, plastic, stone, and air are insulators. Even for insulators, though, electric force can always be turned up high enough to rip electrons away—this is called breakdown. That's what is happening to air molecules when you see a spark.

Semiconductor materials fall between insulators and conductors. They usually act like insulators, but we can make them act like conductors under certain circumstances.

### Basic electrical quantities: current, voltage, power (article) | Khan Academy

The most well-known semiconductor material is Silicon atomic number 1 4 14 Our ability to finely control the insulating and conducting properties of silicon allows us to create modern marvels like computers and mobile phones. The atomic-level details of how semiconductor devices work are governed by the theories of quantum mechanics. Current Current is the flow of charge. Charge flows in a current. Current is reported as the number of charges per unit time passing through a boundary. Visualize placing a boundary all the way through a wire. All materials are made up from atoms, each atom consist of protons, neutrons and electrons. These three are together in the atom. But, if we separate them from each other they want to reform to exert a potential of attraction called a potential difference.

When we build a closed circuit, these electrons move and drift back to the protons because of their attraction to create a flow of electrons, this is called electric current. The electrons do not flow freely due to the restriction of flow of electrons, this is called as resistance.

### Relationship and Difference Between Voltage, Current and Resistance

Then all basic circuits comprise of three separate quantities, namely voltage, current and resistance. Electrical Charge Electricity is the movement of electrons, it creates charge which we can connect to do the work, your light, phone, stereo, etc. These all are operated using the basic power source that is, the movement of electrons. Current is the flow of electrons Resistance is defined as, it is the tendency of a material to restrict the flow of current.

## Basic electrical quantities: current, voltage, power

So, when we discuss about these values, the behavior of electrons in a closed loop circuit allows charge to move from one place to another. He described a unit of resistance which is defined by voltage and current. The difference between voltage and current and resistance is discussed below. In this equation, voltage is equal to the current and that is multiplied by resistance. Basic Circuit Diagram of V, I and R In the above circuit, when the voltage and resistance values are given, then we can calculate the amount of current. The differences between V, I and R are discussed below.

The voltage is defined as, it is the potential difference in charge between the two points on a circuit, it is also called electromotive force.

## Relationship and Difference Between Voltage, Current and Resistance

One point has more charge than another. The unit volt is termed after invented by Italian physicist Alessandro Volta. The term volt is represented by the letter V in schematics. The measuring instrument of voltage is the voltmeter. Voltage is the source and the current is its result, it can occur without current.

The voltage gets distributed over different electronic components which are connected in series in the circuit, and in parallel circuit voltage is same across all components which are connected in parallel.