3.1 Current, Voltage, Power and Resistance Flashcards
1
Q
What direction does current flow in a circuit?
A
Away from negative and towards positive
2
Q
What is current?
A
Flow of charge per second
3
Q
Name sources of emf?
A
Chemical cell Thermocouple Piezoelectric generator Solar cell Electromagnetic generator
4
Q
What is a potential difference?
A
When energy is transformed into another form of energy by a component in the circuit
5
Q
What is voltage?
A
Energy transferred per unit charge
6
Q
How do potential divider circuits work?
A
Voltage is split among components in a series circuit
V1/V2 = R1/R2
