Topic 4.1: Charge and Current Flashcards
1
Q
what is electric current ?
A
the rate of flow of charge
2
Q
what is charge ?
A
a physical quantity , can be either positive or negative
it is measured in coulombs
3
Q
what are two examples of possible charge carriers
A
electrons - in metals
Ions - in electrolytes
4
Q
what is Kirchhoff’s first law ?
A
the total current going in is equal to the total current going out
charge is conserved
