Voltage Explained

Any length or size of wires will have some resistance.

Voltage explained. Voltage electric potential difference electric pressure or electric tension is the difference in electric potential between two points which in a static electric field is defined as the work needed per unit of charge to move a test charge between the two points. What is voltage and what does it do. Voltage also called electromotive force is the potential difference in charge between two points in an electrical field. This is known as ohm s law.

The input voltage is applied across the series impedances z 1 and z 2 and the output is the voltage across z 2 z 1 and z 2 may be composed of any combination of elements such as resistors inductors and capacitors. There is a basic equation in electrical engineering that states how the three terms relate. It is the push that causes charges to move in a wire or other electrical conductor it can be thought of as the force that pushes the charges but it is not a force voltage can cause charges to move and since moving charges is a current voltage can cause a current. Resistance is a material s tendency to resist the flow of charge current.

Current is the effect voltage being the cause. Current is the rate at which charge is flowing. In this video we discuss how it work and its purpose to understand how electricity works. Voltage is the pressure from an electrical circuit s power source that pushes charged electrons current through a conducting loop enabling them to do work such as illuminating a light.

A voltage divider referenced to ground is created by connecting two electrical impedances in series as shown in figure 1. Thus voltage creates the potential for a current to flow. If current can be compared to the flow of water through a hose voltage can be compared to water pressure at the faucet. If the current in the output wire is zero.

Voltage is the difference in charge between two points. It says that the current is equal to the voltage divided by the resistance or i v r. A or amps or amperage. The voltage is equivalent to the water pressure the current is equivalent to the flow rate and the resistance is like the pipe size.

Voltage is what makes electric charges move. Voltage drop vd occurs when the voltage at the end of a run of cable is lower than at the beginning. V or volts or voltage. Voltage drop is the loss of voltage caused by the flow of current through a resistance.

In other words voltage is the energy per unit charge. In brief voltage pressure and it is measured in volts v. The term recognizes italian physicist alessandro volta 1745 1827 inventor of the voltaic pile the forerunner of today s household battery. Current cannot flow without voltage.

The three basic principles for this tutorial can be explained using electrons or more specifically the charge they create.