Capacitance Flashcards
Everything you need to know to get A* in OCR Physics A Level, closely following the specification and the textbook
1
Q
What is a capacitor?
A
An electrical component in which charge is separated
2
Q
What is the units of capacitance?
A
Farads
3
Q
Describe the process that a capacitor undergoes when it gets charged
A
When switch is closed, there is a max current and the capacitor charges up. The p.d. across the capacitor increases from 0
After time, the capacitor is fully charged, the current in the circuit is 0, the p.d. of the resistor is 0
4
Q
How do you calculate total capacitance of capacitors in series?
A
1/C(total) = 1/C1 + 1/C2 + …
5
Q
How do you calculate the total capacitance of capacitors in parallel?
A
C(total) = C1 + C2 + …
