Paper 1 Flashcards
1
Q
Q=
A
IT
W/V
CV
2
Q
Energy E =
A
E= Pt power x time
=1/2 CV2
3
Q
Electric Field Strength
A
E= F/Q
Force ove Charge
4
Q
Capacitance
A
Q/V
5
Q
Charging through a capacitor
A
Q=Q₀(1-e⁻ᵗ/ᴿᶜ)
I=I₀e⁻ᵗ/ᴿᶜ
V꜀=Vₛ(1-e⁻ᵗ/ᴿᶜ)
6
Q
Discharging through a capacitor
A
Q=Q₀e⁻ᵗ/ᴿᶜ
7
Q
Capacitance triangle
A
CVQ (same order as STD)
8
Q
B in magnetic flux density
A
μ₀I/2πr
μ₀NI/2πr where N number of turns in coil
μ₀nI where n is number of turns per unit length m⁻¹ if i cm divide value by 0.01
9
Q
Farad is whose unit
A
Capacitance
10
Q
magnetic field strength
A
using F=BILsinθ
F(subscript B) = BILsinθ
Where is magnetic field strength
11
Q
The two transformer eq
A
IₚVₚ=IₛVₛ
Nₚ/Nₛ=Vₚ/Vₛ where is the number of turns
12
Q
Vout
A
A( V+ - V-)
13
Q
kirchoffs 1st law is
A
charge E=V1+V2
14
Q
W=
A
Q2/2C
15
Q
ₛkirchoffs 2NDlaw is
A
energy SUM OF EMF = SUM OF PD
