# State the relationship of voltage current and resistance

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

Ohm's law states that the electrical current (I) flowing in an circuit is increasing the resistance of the circuit will lower the current flow if the voltage is not changed . The formula can be reorganized so that the relationship can easily be seen for. When commencing to explore the globe of electronics and electricity, it is very important to begin by understanding the fundamentals of voltage. George Simon Ohm discovered the relationship between current, voltage, and resistance in an electric circuit in He found, by experiment.

When we speak of a certain amount of voltage being present in a circuit, we are referring to the measurement of how much potential energy exists to move electrons from one particular point in that circuit to another particular point.

Free electrons tend to move through conductors with some degree of friction, or opposition to motion.

## Ag Power Web Enhanced Course Materials

This opposition to motion is more properly called resistance. The amount of current in a circuit depends on the amount of voltage available to motivate the electrons, and also the amount of resistance in the circuit to oppose electron flow.

Just like voltage, resistance is a quantity relative between two points. Volt, Amp, and Ohm To be able to make meaningful statements about these quantities in circuits, we need to be able to describe their quantities in the same way that we might quantify mass, temperature, volume, length, or any other kind of physical quantity.

Here are the standard units of measurement for electrical current, voltage, and resistance: Standardized letters like these are common in the disciplines of physics and engineering, and are internationally recognized. Each unit of measurement is named after a famous experimenter in electricity: The amp after the Frenchman Andre M.

The mathematical symbol for each quantity is meaningful as well. Most direct-current DC measurements, however, being stable over time, will be symbolized with capital letters.

Coulomb and Electric Charge One foundational unit of electrical measurement, often taught in the beginnings of electronics courses but used infrequently afterwards, is the unit of the coulomb, which is a measure of electric charge proportional to the number of electrons in an imbalanced state.

One coulomb of charge is equal to 6,,, electrons.

### Electrical/Electronic - Series Circuits

Cast in these terms, current is the rate of electric charge motion through a conductor. As stated before, voltage is the measure of potential energy per unit charge available to motivate electrons from one point to another.

At first, these concepts may be tough to grasp because we cannot see them. One cannot see with the eye the flowing of energy through a wire. However, a reaction within the air to the energy passing through it.

So, as to notice this energy transfer, we should use measurement tools like a spectrum analyzer, multimeter and oscilloscope. This oscilloscope is used to visualize what is happening with the charge in a system.

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.

**What is voltage? -- What is current? -- What is resistance?**

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.

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.

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. One point has more charge than another.