Definition

1. Noun (Proper):

   • Joseph Henry (1791–1878): A United States physicist renowned for his independent discovery of electromagnetic induction and for whom the unit of inductance is named.
   • Patrick Henry (1736–1799): A prominent leader and orator during the American Revolution, famous for his declaration "Give me liberty, or give me death!"
   • William Henry (1775–1836): An English chemist best known for formulating Henry's law, which describes the solubility of gases in liquids.

2. Noun (Unit):

   • Henry (Symbol: H): The SI derived unit of electrical inductance. One henry is defined as the inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current in the circuit varies uniformly at a rate of one ampere per second.

Usage Examples

• Noun (Proper):

  • The scientist Henry made crucial contributions to the development of the telegraph.
  • Patrick Henry's speeches inspired many colonists to support independence.
  • Henry's law, named after William Henry, is fundamental in physical chemistry.

• Noun (Unit):

  • This inductor has a value of 10 millihenries (mH).
  • The circuit requires a coil with an inductance of several henries.

Advanced Usage

• The unit is always written in lowercase (henry) when spelled out, even though it is derived from a proper name. The symbol (H) is capitalized.
• In technical contexts, standard multiples like microhenry (µH), millihenry (mH), and kilohenry (kH) are commonly used.

Variants and Related Words

• Inductance (n): The property of an electrical conductor which is the cause of the electromotive force generated by a change in the current flowing through it, measured in henries.
• Henry's Law (n): A gas law stating that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid.

Synonyms

• (For the unit): There is no direct synonym for the unit "henry." It can be described as .

Related Phrases

• International henry: A former, slightly different definition of the henry, now superseded by the SI definition.

Noun

1. United States physicist who studied electromagnetic phenomena (1791-1878)
2. a leader of the American Revolution and a famous orator who spoke out against British rule of the American colonies (1736-1799)
3. English chemist who studied the quantities of gas absorbed by water at different temperatures and under different pressures (1775-1836)
4. a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second