A voltmeter is an electrical device that measures voltage numerically in volts. At the time of computation and application, the unit of Volts is symbolized by the letter “V.” A volt is used to measure three different things. The three variables to consider are the potential difference, electromotive force, and voltage.

An ammeter is a device used to measure the numerical value of the passage of electrons or electric current. During the calculation and application process, the unit of Amp or ampere is denoted as “A.” The ampere or Amp is exclusively used to measure electric current.

## Key Takeaways

- Volts measure electrical potential difference, while amps quantify electric current flow.
- The power in an electrical circuit depends on voltage and current, as per the formula: Power (Watts) = Volts x Amps.
- Different devices require specific combinations of volts and amps to function correctly.

## Volt vs Amp

Volt is the unit of measurement for electric potential difference, measuring how much electrical energy is required to move a unit charge. Ampere is the unit of measurement for electric current, which is the rate at which electric charge flows through a circuit. It is the measure of how many charges pass through a point in a circuit per unit time.

The unit “volt” is commonly expressed in Joule upon Coulomb, which is a mathematical formula used to calculate and apply the unit. The amount of voltage in any area encompassed by two points inside a closed circuit is normally measured in terms of volts. Voltmeters are electronic devices that measure voltage in volts. When calculating and applying Volts, the unit is indicated by the letter “V.” Three different things are measured with volts. The potential difference, electromotive force, and voltage are the three variables that must be considered.

The unit “Amp” is shown as a Coulomb on second, which is also the formula used in several branches of mathematics and physics. Current, unlike voltage, can be measured anywhere in a circuit. The Amp is thus calculated based on the numerical or quantitative value of electrons passing through a specific place in a second. An ammeter is a device used to measure the numerical value of electron flow or electric current. During the calculation and application process, the amp or ampere unit is indicated by “A.” Only electric current (Amp or ampere) is measured.

## Comparison Table

Parameters of Comparison | Volt | Amp |
---|---|---|

Analogy | The pressure is possessed by water or any other liquid that is stored inside large pipes. | The speed or rate at the flow of any liquid like water through all the thinner and smaller pipes. |

Mathematical Formula | Joule/coulomb | Coulomb/ second |

Denoted as | V | A |

Measurement Device used | Voltmeter | Ammeter |

Measuring quantities | Potential Difference, electromotive force, voltage | Electric current |

## What is Volt?

The term “volt” refers to the unit of measurement for voltage, also known as electric potential difference. The pressure of water or any other liquid that is stored inside big pipes can be characterized as the analog of a volt.

The unit “volt” is commonly expressed in Joule upon Coulomb, the mathematical formula used to calculate and apply the unit. The quantity of voltage in any area encompassed by two points is normally measured in terms of volts inside a closed circuit.

A voltmeter is an electronic device that measures voltage as a numerical number in volts. At the time of calculation and application, the unit of Volts is denoted as “V.” The volt is used to measure three different things. The three factors to consider are the potential difference, electromotive force, and voltage.

## What is Amp?

The term “amp” is used to describe the measurement unit for electric current flowing through any equipment that transports heat and electricity, such as a conductor. The speed or rate at which any liquid, such as water, flows through all of the thinner and smaller pipes can be compared to Amp.

The unit “Amp” is represented as a Coulomb upon second, which is also the formula used in several branches of mathematics and physics. Current, unlike voltage, can be measured in any part of the circuit. As a result, the Amp is determined by the numerical or quantitative value of electrons passing through a specific place in a second.

An ammeter is a device that is specifically intended to measure the numerical value of electron flow or electric current. During the calculation and application phase, the unit of Amp or ampere is denoted as “A.” Only electric current is measured in amps or amperes.

## Main Differences Between Volt and Amp

- The term “volt” is considered as the measuring unit of voltage or also called the electric potential difference. On the other hand, The term “Amp” is considered as the measurement unit of the electric current that flows through any device that conducts heat and electricity, i.e., conductor.
- The analogy of volt can be defined as the pressure possessed by water or any other liquid which is stored inside large pipes. On the other hand, the Amp can be compared with the speed or rate at a flow of any liquid, like water, through all the thinner and smaller pipes.
- The unit “volt” is presented in the form of Joule upon Coulomb, which is the mathematical formula used for the purpose of calculation and application. On the other hand, the unit “Amp” is presented in the form of Coulomb upon second, which is also the formula used while applied in various fields of mathematics or physics.
- Inside a closed circuit, the amount of voltage is measured in terms of volts in any area enclosed by two points. On the other hand, unlike voltage, current can be measured at any area of the circuit. Thus, the Amp is obtained depending upon the numerical or quantitative value of electrons that pass a particular point in a second.
- A voltmeter is an electronic device that measures the numerical value of voltage in terms of volts. On the other hand, Ammeter is a device specially designed to measure the numerical value of the flow of electrons or electric current.
- The unit of Volts is denoted as “V” at the time of its calculation and application. On the other hand, the unit of Amp or ampere is denoted as “A” during the calculation and application time.
- Volt is used to measure a total of three things. 1. Potential difference, 2. Electromotive force, 3. Voltage. On the other hand, Amp or ampere is used to measure electric current only.

**References**

- http://www.introductiontorife.com/refandres/files/papers_articles/Low-Volt%20Pulsed%20Micro-Amp%20Stimulation%20-%20Picker.pdf
- https://ieeexplore.ieee.org/abstract/document/1483571/

Last Updated : 11 June, 2023

Piyush Yadav has spent the past 25 years working as a physicist in the local community. He is a physicist passionate about making science more accessible to our readers. He holds a BSc in Natural Sciences and Post Graduate Diploma in Environmental Science. You can read more about him on his bio page.