M3.3 Flashcards
How is a potential difference caused?
Between two differently charged points
How is a electrical voltage caused?
When there is a lack of electrons at one point and a excessive amount at another
What is the formula for current(I)?
Charge(Q) / Time(T)
What is 1 coulomb equal to?
1 ampere-second
What way does conventional flow go?
Positive to negative
What way does electron flow go?
Negative to positive
What is a current that periodically changes flow known as?
AC current
Is chemically pure water conductive?
No
When current is passed through water what happens at the negative end?
All the hydrogen gathers up
When current is passed through water what happens at the positive end?
All the oxygen gathers up
What type of gases are used to stopped filament bulbs from burning?
Nitrogen, argon, krypton
What do oscillographs or oscilloscopes provide?
A visualisation of rapidly varying processes in electrical engineering
What is the difference between a oscillograph and a oscilloscope?
A oscillograph can permanently record the information but a oscilloscope can only view
What is the electron beam tube also known as?
The Braun tube
On a sin graph what does a straight line and waved line indicate?
The straight line is DC and a waved line is AC
