E Further Electrical Concepts Flashcards
1
Q
Lorentz equation
A
F=BLI
Force = flux density x length x current
Left hand rule
2
Q
Which 3 factors determine capacitance?
A
- Area of the plates (large is more)
- Distance between the plates (closer is more)
- Dielectric instant (higher is more)
3
Q
Capacitance equation
A
c=qv
q is charge
4
Q
Voltage definition
A
The electrical potential difference between 2 points
5
Q
Current definition
A
The flow of electrons
6
Q
Resistance definition
A
The opposition to current flow in a circuit
7
Q
Ohms law
A
V=IR
8
Q
What is a thermistor with a positive temperature coefficient?
A
Resistance increases with increasing temperature
9
Q
What is a thermistor with a negative temperature coefficient?
A
Resistance decreases with increasing temperature
