Electrical engineering notes

Terminology

Ampere

A unit of electric current with symbol A. It is a base SI unit that assumes an electron to have an electrical charge of exactly 1.602176634×10^−19 C. It may be expressed as 1 C/s.

Henry (unit)

A unit of inductance with symbol H. Units are kg*m^2/(s^2*A^2), J/A^2, V*s/A (among others).

Kirchhoffʼs laws

(a.k.a. Kirchhoffʼs circuit laws, Kirchhoffʼs junction rule) A method to deduce voltages and currents in circuits.

Current version: The algebraïc sum of currents in a network of conductors meeting at a point is zero. (i.e. The current entering any junction is equal to the current leaving that junction; conservation of charge).

Voltage version: The directed sum of the potential differences (voltages) around any closed loop is zero.

Volt

A unit of electric potential with symbol V. Units are kg*m^2/(s^3*A), A*Ω, W/A, J/C

Tesla (unit)

A unit of magnetic flux density with symbol T. Units are kg/(s^2*A), N*s/(C*m), Wb/m^2, J/(A*m^2), V*s/m^2.

Weber (unit)

A unit of magnetic flux with symbol Wb. Units are kg*m^2/(s^2*A), V*s, T*m^2, H*A.

See also

• Wikipedia:Electrical engineering

External links

• bk4, reboil.com