Electricity - Capacitors Flashcards
(7 cards)
1
Q
What is a capacitor?
A
A gap in a circuit with space for charge on the plates
2
Q
A capacitor of 1 farad will store…
A
1 coulomb of charge when pd across it is 1 volt
3
Q
What happens when a capacitor is charged?
A
Electrons on lower plate repel electrons from the upper plate which then move to the positive terminal of the supply
4
Q
What is the area under a charge-pd graph?
A
The total energy stored in a charged capacitor
5
Q
What happens to current and voltage when a capacitor charges?
A
-Current decreases
-Voltage increases
6
Q
What happens when a capacitor discharges?
A
- Current increases
- Voltage decreases
7
Q
A
