F5C5: Electronics Flashcards
1
Q
thermionic emission
A
the emission of electrons from a heated metal surface
2
Q
cathode rays
A
a beam of fast moving electrons travel in a straight line in the vacuum
3
Q
semiconductor
A
material which can conduct electricity better than insulators but not as well as conductors
4
Q
diode
A
electronic component that allows current to flow in 1 direction only
5
Q
rectifier
A
device to convert a.c. to d.c. by diode
