Power In Terms Of Voltage

In brief voltage pressure and it is measured in volts v.

Power in terms of voltage. The voltage is equivalent to the water pressure the current is equivalent to the flow rate and the resistance is like the pipe size. Power frequency for durations from 0 5 cycle to 1 min. The terms electric potential potential and potential difference are terms more often used by physicists. 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.

The terms voltage and electric potential are ambiguous in that in practice they can refer to either of these in different contexts. This is analogous to an increase in voltage that causes an increase in current. We call the product of current gain and voltage gain power amplification. Sources voltage sags are result of system faults and also can be caused by energization of heavy loads or starting of large motors.

Since these quantities are almost always expressed in volts or some related unit such as millivolts engineers electricians hobbyists and common people usually use the term voltage instead of potential. In this analogy the width of the hose is the resistance. There is a basic equation in electrical engineering that states how the three terms relate. Aswell is defined as an increase to between 1 1 and 1 8 pu in rms voltage or current at the power frequency for durations from 0 5 cycle to 1 min.

Now we re starting to see the relationship between voltage and current. The term electromotive force was first used by volta in a letter to giovanni aldini in 1798 and first appeared in a published paper in 1801 in annales de chimie et de physique. This means we need to add another term to our model. The word power amplifier is a misnomer especially in audio engineering.

Voltage and current can be amplified. A neat analogy to help understand these terms is a system of plumbing pipes. Power factor cos φ is an important part of an ac circuit that can also be expressed in terms of circuit impedance or circuit power. Power factor is defined as the ratio of real power p to apparent power s and is generally expressed as either a decimal value for example 0 95 or as a percentage.

But there is a third factor to be considered here. The width of the hose. The term recognizes italian physicist alessandro volta 1745 1827 inventor of the voltaic pile the forerunner of today s household battery.