A-z of electrickery

X = symbol of reactance.
Reactance, the opposition of inductance and capacitance to alternating current, expressed in ohms: equal to the product of the sine of the angular phase difference between current and voltage and the ratio of the effective voltage to the effective current, symbol X.

Y

Yagi–Uda antenna - A type of radio antenna using a feeder element, one or more parasitic reflector elements, and one or more director parasitic elements to provide a directional characteristic; the classic home TV rooftop antenna was usually a Yagi antenna.

Z

Zzzzzzzzzzzz the sound a busbar makes

Ampere.

The ampere is the SI base unit of electrical current.

B

Barretter

C

Capacitor.

D

degaussing
E

EMF


F

Frequency.
The number of complete cycles of a wave-form per second, measured in Hertz (Hz).
If a current completes one cycle per second, then the frequency is 1 Hz, 60 cycles per second equals 60 Hz.

G

Gamma Ray

Electromagnetic radiation with wavelengths shorter than ten nanometres. Strictly: radiation that is produced in the nucleus of atoms.

H

Harmonic.
Sine wave that is smaller in amplitude and some multiple of a fundamental frequency. Example: 880 Hz. is the second harmonic of 440 Hz., 880 Hz. is the third harmonic of 220 Hz.

I

Ignition coil


J

Jacobs Ladder





K

Kirchhoff's Laws
L

Loudspeaker

M

magnetron
N

Neutral

O

oersted
P

Potentiometer


Q

Quasi-Static Electric Field Generator
R

Reactance.
The opposition of inductance and capacitance to alternating current, expressed in ohms.

S

superconductivity


T

Thermocouple.

U

undulator

IMAGE: SCU15 IS A UNIQUE SUPERCONDUCTING UNDULATOR FOR PRODUCTION OF HIGH-BRILLIANCE X-RAYS INSTALLED IN THE ANKA STORAGE RING.
V

TV Valve.

W