Module 6 part 1 capacitors

Question 1

capacitance

Answer 1

The charge stored per unit pd in a capacitor

Question 2

Capacitor

Answer 2

An electrical component that stores charge. A parallel-plate capacitor
is made of two parallel conducting plates with an insulator between them
(dielectric)

Question 3

unit of capacitance

Answer 3

farad

Question 4

charging of capacitor, in terms of electron flow

Answer 4

1. during charging, electron flow from neg terminal of cell to neg on capacitor
2. they repel electrons off the pos plate of capacitor, which move towards pos terminal of cell
3. plates aquire equal and opposite charge
4. Until capacitor has same pd as power supply

Question 5

discharging of capacitor, in terms of electron flow

Answer 5

1. excess electron flow from neg plate to pos
2. charge on capacitor decreases

Question 6

capacitor in series and explained

Answer 6

series - 1/Ct = 1/C1 + 1/C2 …

C = Q/V

Current is equal so charge is

voltage adds

Vt/Q = V1/Q + V2/Q

we need inverse as C = Q/V

then we get 1/Ct = 1/C1 + 1/C2 …

Question 7

capacitor parallel and explained

Answer 7

parallel - Ct = C1 + C2 …

C = Q/V, current in parallel adds meaning charge will add, and voltage is constant

use charge equation substitute VCt = VC1 + VC2

V cancels and get:

Ct = C1 + C2