In electrical and electronics engineering, electric current, voltage, power, and frequency are the most important and basic terms. If you want to strengthen your theoretical as well as practical knowledge, then you must have a clear idea about these basic terms. In this article, we are going to see the symbol of these terms.

## Electric Current Symbol

Electric current is the flow of electrons through a conductor. When a potential difference or voltage is applied across a conductor, the current will start flowing from the higher potential to the lower potential. Actually, this flowing of electric current does the useful works. Here, you can see the symbol of current.

The theoretical symbol of electric current is denoted by the English letter 'I'. All theoretical data, mathematical calculations use this symbol.

## DC or Direct Current Symbol

According to the nature of polarity and magnitude with time, electric current is classified into two types - alternating current and direct current. Direct Current or DC does not have any polarity and has a constant magnitude. Here, you can see the symbol of direct current.

The symbol of direct current is denoted by a straight line, which indicates its constant polarity and magnitude.

## AC or Alternating Current Symbol

Alternating current has changing polarity and magnitude with time. This magnitude and polarity depend upon the frequency of the power supply. Here, you can see the symbol of alternating current.

## Voltage Symbol

Voltage is the electric pressure or potential difference across a conductor that force to flow the electric current. Here, you can see the symbol of voltage.

Electric voltage is denoted by English letter 'V'. In theory, this symbol is used for all the calculations.

## DC Voltage Symbol

Here, you can see the symbol of DC Voltage. DC voltage is commonly used in many electronic devices, such as computers, mobile phones, and household appliances. It is also essential for various industrial applications, including motor control, telecommunications, and power distribution.

## AC Voltage Symbol

Here, you can see the symbol of AC Voltage. AC voltage is the primary type of electrical power used in most homes, buildings, and industrial applications. It is generated by power plants and distributed through the power grid. The voltage oscillates in a sinusoidal waveform, commonly represented as a sine wave.

## Power Symbol

Electric power is the combination of voltage and current consumed by a load or delivered by a power source. Electrical power refers to the rate at which electrical energy is transferred or consumed in an electrical circuit. It is measured in watts (W) and represents the amount of work done or energy converted per unit of time. Here, you can see the symbol of power. It is denoted by the English letter 'P'.

## Practical Symbol of Power

Here, you can see the standard practical symbol of power. this symbol is used with power ON/OFF switches, power buttons, etc.

## Frequency Symbol

The term 'Frequency' indicates that ho many times the polarity of alternating current changes per second. Here, you can see the symbol of frequency. It is denoted by the English letter 'F'.

## Frequency Wave Symbol

Frequency wave refers to the characteristic oscillation pattern or vibration of a wave as it repeats over time. It represents the number of complete cycles or waveforms that occur in one second and is measured in hertz (Hz). Here, you can see the symbol of Frequency Wave.