Unit Two: Circuits Flashcards
1
Q
What is the name of the flow of electric charge around a circuit?
A
Current
2
Q
What does there have to be for a current current to flow across a component?
A
Potential difference
3
Q
What is potential difference?
A
The driving force that pushes the current round
4
Q
What are the units of:
Potential difference
Current
Resistance
A
volt, V
amps, A
ohm
5
Q
What is resistance?
A
Anything in the circuit which slows the flow down
6
Q
What does an ammeter do/measure?
A
Measures the current (amps) flowing through the component
7
Q
What does a voltmeter measure?
Where must it be placed?
A
Measures potential difference (in volts) across the component
In parallel around the component under test
