GENERAL PHYSICS
2
CAPACITORS
Lesson 3.1
General Physics 2 l Quarter 3 l Lecture 3
CAPACITORS IN
ELECTRONIC CIRCUIT
CAPACITORS
A capacitor is a device that stores
electric potential energy and electric
charge.
Capacitors are one of the fundamental
passive components. In its most basic
form, it is composed of two plates
separated by a dielectric.
CAPACITORS
CAPACITORS
A capacitor with stored charge can act as a temporary battery.
• Capacitance is the ratio of
charge to voltage
• Units : C/V or Farad
Rearranging the formula:
CAPACITANCE
the ability of a component or
circuit to collect and store energy
in the form of an electrical
charge
Q = CV
where:
Q is the magnitude of charge
C is the capacitance
V is the magnitude of electric potential
Rearranging the amount of
charge on a capacitor is
determined by the size of the
capacitor (C) and the voltage (V)
𝑸 Magnitude(C)of Charge
𝑪=
Capacitance
𝑽
Magnitude of Electric Potential
(F)
(V)
CAPACITORS AND DIELECTRICS
CAPACITANCE
Permittivity of
free space
𝜖𝑜 𝐴
𝐶=𝐾
𝑑
Capacitance
(F)
Schematic Diagram of the FORMULA
Dielectric
constant
where:
Plate Area
Distance between plates
• C = Capacitance
• 𝝐𝒐 = Permittivity of free space
(𝟖. 𝟖𝟓 𝒙 𝟏𝟎−𝟏𝟐 𝑭/𝒎)
• A = plate area
• d = distance between plates
• k = dielectric constant
ENERGY AND CAPACITANCE
Q = CV
𝑸
𝑽=
𝑪
Measure how much energy stored in
the system
𝑱
𝑼𝑵𝑰𝑻𝑺: ൗ 𝟑
𝒎
“Be a DIODE to remove negative thinking.
TRANSISTOR to amplify your character,
RESISTOR to drop bad habits and
CAPACITOR to store good thoughts.
For an ELECTRIFYING life, above component are a must.”
-Anonymous