The international standard unit of measurement is generally lowercase. Only when the units named after names are involved, such as Volt V, Ampere A, Kelvin K, Watt W, etc., in order to show respect for the predecessors of scientists, use capital letters, and other non-personally named units generally use lower case.

Secondly, for quantifiers, the initial magnitude is generally lowercase. If the same letter is the same letter, uppercase and lowercase are often distinguished by different magnitudes, such as mΩ, MΩ, lowercase m means 1×10-3; uppercase M means 1×106. So here k means 1×103 and should be lowercase. (Perhaps this lowercase k is to distinguish it from K (Kelvin)) In summary, we can find that kV should be lowercase k and uppercase V. In fact, you can understand this question in all capitals. It is mainly academically speaking. We have to write in accordance with the national standards.

 

The standard symbol of the unit of measurement must be correct

The capitalization of letters cannot be arbitrary. Such as A, V, W, kV, kW, kVA, kvar, lx, km, etc., all legal units of measurement should be used, and special attention should be paid to the correct capitalization of the unit symbols and letters. Any unit symbols converted from personal names such as A, V , W, N, Pa and the beginning symbols of megabytes or more such as M and G should be capitalized; otherwise, they should be all lowercase, such as kV, MW, kvar, km, etc. For information on measurement units, please refer to "Industrial and Civil Power Distribution Design Manual" Chapter 16, pages 773 to 783. On November 16, 2018, the 26th International Conference on Weights and Measures passed the "Revision of the International System of Units" resolution, which officially updated the definition of 4 basic units including the international standard mass unit "kilogram". The new international system of units uses physical constants to redefine the mass unit "kilogram", the current unit "ampere", the temperature unit "Kelvin" and the substance unit "mole".

 

In fact, many of our familiar measurement units correspond to the names of the corresponding scientists!

A——Ampere,

Abbreviated as ampere, it is a unit of measurement that expresses the amount of electric current, named after the French physicist Ampere. Andre Marie Ampere, aged 61, laid the foundation for the study of electrodynamics.

 

Bq-Becquerel,

The abbreviation becque is a unit of measurement that represents the measurement of radioactivity, named after the French physicist Becquerel's surname. Anthony Henry Becquerel, aged 56, first discovered the radioactivity of uranium and won the Nobel Prize in Physics in 1903.

 

C——Coulomb,

The abbreviation library is a unit of measurement that expresses the amount of electric charge, named after the French physicist Coulomb's surname. Charles Augustine Di Coulomb, at the age of 70. He used a torsion balance to measure electrostatic and magnetic forces, and derived the famous Coulomb's law.

 

℃——Celsius,

It is a unit of measurement for the amount of temperature in degrees Celsius. There is no abbreviation. It is derived from the surname of the Swedish physicist Celsis. Angus Celsis, at the age of 43. In 1742, the decimal indexing method using temperature was proposed. The indexing method for this temperature is the Celsius temperature scale, but Celsius is not used as the unit name for the amount of Celsius temperature, so its foreign symbols are not capitalized.

 

F——Fara,

The abbreviation method is a unit of measurement that expresses electric capacity, named after the British physicist Faraday's surname. Michael Faraday, at the age of 76, has made breakthroughs in the study of magnetic induction and magnetic field lines and proposed Faraday's law of electrolysis.

 

Gy——Grey,

Ge, abbreviated as Ge, is a unit of measurement that expresses absorbed dose, named after the British physicist Grey’s surname. Louis Herbert Gray,

He was 60 years old. He laid the foundation for ionizing radiation dosimetry and electron-cation conversion theory, and for the first time quantitatively assessed the effect of oxygen on tissue resistance during radiation.

H—Henry,

The abbreviation Henry is a unit of measurement that expresses inductance and is named after the American physicist Henry. Joseph Henry, at the age of 81. His research results laid the theoretical foundation for the construction of transformers, and played a significant role in radio communications and radio broadcasting.

 

Hz—Hertz,

Hertz, abbreviated as Hertz, is a unit of measurement that expresses frequency. It is named after the German physicist Hertz. Henrik Rudolf Hertz, aged 37, has made important achievements in electromagnetic wave research.

 

J—Joule,

The abbreviated "Jiao" is a unit of measurement for work and energy, named after the surname of the British physicist Joule. James Prestige Joule, at the age of 71, discovered the basic principles of Joule's law, proposed the law of conservation of energy, and cooperated with Kelvin to propose the Joule-Thomson effect.

 

K—Kelvin,

Abbreviated as Kai, it is a unit of measurement that expresses thermodynamic temperature. It is named after the British physicist Lord Kelvin. Kelvin, formerly known as William Thomson, died at the age of 83. In 1851, he proposed the second law of thermodynamics and created the absolute temperature scale based on the Carnot thermal cycle theory, which was later called the Kelvin temperature scale.

 

N—Newton,

The abbreviated cow is a unit of measurement that expresses force and weight, and is named after the surname of British physicist Newton. Isaac Newton, who was 84 years old, established the three laws of mechanical motion in the field of mechanics, created the classical mechanics system, and invented the law of universal gravitation.

 

Pa—Pascal,

Pa, abbreviated as Pa, is a unit of measurement for pressure and pressure, named after the French physicist Pascal's last name. Bryce Pascal, aged 39, has made outstanding achievements in hydrostatic and dynamic research, proposed Pascal's law, and designed a binary arithmetic calculator.

 

S—Siemens,

West, abbreviated as West, is a unit of measurement that expresses the amount of conductivity, named after the German physicist Siemens. Enste Weiner von Siemens, aged 76, has a series of research results in electroplating and telegraph equipment.

 

Sv—Sievert,

The abbreviated Greek, is a unit of measurement that expresses the dose equivalent, named after the Swedish physicist Sievert. Rolf Sievert, aged 70, has made important contributions to radiobiology.

 

T—Tesla,

Abbreviated as special, it is a unit of measurement that expresses magnetic flux density and magnetic induction intensity, named after the surname of the Yugoslav physicist Tesla. Nikola Tesla, aged 87, has successfully researched electric motors and AC power transmission systems, invented telephone amplifiers, arc lighting systems, and Tesla motors and Tesla coils.

 

V—Volt,

Abbreviated as volt, it is a unit of measurement that expresses potential, voltage, and electromotive force. It is named after the Italian physicist Volt. Alexander Volt, who was 82 years old, invented the electrostatic electrification plate, volt battery, electroscope and storage device.

 

W—Watt,

Abbreviated as Watt, it is a unit of measurement that expresses the amount of power, named after the surname of the British inventor Watt. James Watt, who was 83 years old, was designed as a condenser and made into a double-acting steam engine, which opened the way for the power engine revolution.

 

Wb—Weber,

Abbreviated as Wei, it is a unit of measurement representing magnetic flux, named after the German physicist Weber's surname. William Et Weber, at the age of 87,

Important achievements have been made in the study of the electromagnetic unit system of electrostatic units, which paved the way for the birth of electromagnetic theory.