Chapter 15: Current Electricity Flashcards
1
Q
Conventional current and electron flow
A
Opposite Conventional current (+) Electron flow (-)
2
Q
Electric current
A
The rate of flow of electric charge
I = Q / t
Ampere (A)
Ammeter
3
Q
Ammeter
A
Series circuit
+ to -
4
Q
Electromotive force (e.m.f.)
A
The work done by the source in driving a unit charge around a complete circuit
Volt (V)
e.m.f. = W / Q
5
Q
Potential difference
A
The work done to drive a unit charge through the component
Volt (V)
V = W / Q
6
Q
Voltmeter
A
parallel
EMF or PD
+ +
- -
7
Q
Resistance
A
The ratio of the potential different across it to the current flowing through it
R = V / I
R = p l / A
ohm
8
Q
Greatest resistance
A
longest
thinnest
