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A2 Physics > Capacitors > Flashcards

Flashcards in Capacitors Deck (11)
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1

What are the two types of capacitor?

Ceramic and electrolytic

2

What is the main difference between putting an electrolytic and ceramic capacitor in a circuit?

An electrolytic capacitor is polarised

3

What are capacitors used for?

To store charge

4

What does the rate of discharge of a capacitor depend on?

-The size of the capacitance
-The resistance in the circuits

5

How is capacitance calculated?

C = Q/V

6

What is the unit of capacitance?

Farad

7

Give three examples of how capacitors are used.

- Smoothing power supplies
- Time delay circuits

8

What pattern does the discharge of a capacitor follow?

Exponential

9

How is the charge of a discharging capacitor calculated?

Q = Q0e^(-t/CR)

10

How is the half life of a capacitor calculated?

t = CRln2

11

How is the time constant of a capacitor calculated?

τ = CR