2.1 Conduction of Electricity Flashcards
1
Q
The law of conservation of charge
A
The net charge in a system remains constant (provided charges can’t enter or leave)
2
Q
Charge is
A
a scalar quantity
3
Q
The electric current through a conductor is
A
the rate of flow of charge: the charge passing per unit time through a cross-section of the conductor
4
Q
Current =
A
change in charge/ change in time
5
Q
A=
A
Cs^-1
6
Q
Drift velocity
A
Directions of motion for electrons are random, so we’re only interested in the superimposed drift velocity
7
Q
I=
A
nAve
8
Q
An ammeter measures
A
current, it must be in series
9
Q
Current is the same all around a
A
series circuit as it follows the law of conservation of charge
