3.4 Flashcards
1
Q
What is a method to emit electrons?
A
Heating
Chromel and alumel can be used in thermionic emission
2
Q
What is the form-of emission referred to when heating to emit electrons?
A
Thermionic emission
3
Q
What is the result of light impinging on certain semiconductor materials?
A
Charge separation.
4
Q
What is the Piezoelectric effect?
A
A voltage being generated if a Piezo crystal is deformed by using pressure.
5
Q
What do 2 bodies of difference charge have?
A
A voltage between them. (And an electrical field)
6
Q
What happens between 2 bodies if the electrical field gets too strong?
A
Electrons move towards the positively charged body.
7
Q
What do static dischargers do on aircraft?
A
Discharge the static build up created by friction as it flies through the air.
(On trailing edges)
