CHAPTER 2 CAPACITOR DIELECTRIC STUDENT 
CHAPTER 2
CAPACITOR & DIELECTRIC
Subtopics
2.1
2.2
2.3
2.4
Capacitance, Capacitor in series & parallel
Charging & discharging of capacitors
Capacitors with dielectric
Energy stored in a charged capacitor
2.1 Capacitance, Capacitor in series & parallel
Learning Outcomes:
At the end of this topic, students should be able to:
Define capacitance
Use the capacitance formula
Determine capacitance of parallel plate
Deduce & calculate the effective capacitance of capacitors in series &
parallel
2.1.1 Capacitor
capacitor is electric component to store electric charge
it is consists two conducting plates separated by a small air gap or a thin insulator (called dielectric such as mica, ceramics, paper)
the conducting plates could be in the shape of :
i. cylindrical ii. spherical iii. parallel plate
2.1.1 Capacitor
symbol
2.1.1 Capacitor
uses of capacitor:
- capacitors are commonly used in many electronic circuits
i. Photoflash unit ii. Giant lasers iii. Computer keyboard
2.1.1 Capacitor
Capacitance, C
the ability of a capacitor to store charge is measured by its capacitance
defined as the ratio of the charge, Q on either plate to the potential
different, V between them
Q
C
V
unit: Farad (F)
Q : magnitude of the charge on each plate
V : potential difference across the two plates
Exercise 1
1) When a potential difference of 24 V is applied across a capacitor, the charge on the capacitor is 120 μC. Determine the capacitance of the capacitor [Ans : 5x10-6]
2) Determine the charge on a 300 pF capacitor when it is charged to a voltage of
1.0 KV
[Ans : 3x10-7]
3) Determine the potential difference across a capacitor with 235 μC and
526 nF
[Ans : 446.8]
2.1.2 Capacitor in series & parallel
CAPACITORS
(1) Series
(2) Parallel
2.1.2 Capacitor in series & parallel
Capacitors in series
Figure shows three capacitors are connected in series to a battery of voltage, V
2.1.2 Capacitor in series & parallel
Capacitors in series
The
CAPACITOR & DIELECTRIC
Subtopics
2.1
2.2
2.3
2.4
Capacitance, Capacitor in series & parallel
Charging & discharging of capacitors
Capacitors with dielectric
Energy stored in a charged capacitor
2.1 Capacitance, Capacitor in series & parallel
Learning Outcomes:
At the end of this topic, students should be able to:
Define capacitance
Use the capacitance formula
Determine capacitance of parallel plate
Deduce & calculate the effective capacitance of capacitors in series &
parallel
2.1.1 Capacitor
capacitor is electric component to store electric charge
it is consists two conducting plates separated by a small air gap or a thin insulator (called dielectric such as mica, ceramics, paper)
the conducting plates could be in the shape of :
i. cylindrical ii. spherical iii. parallel plate
2.1.1 Capacitor
symbol
2.1.1 Capacitor
uses of capacitor:
- capacitors are commonly used in many electronic circuits
i. Photoflash unit ii. Giant lasers iii. Computer keyboard
2.1.1 Capacitor
Capacitance, C
the ability of a capacitor to store charge is measured by its capacitance
defined as the ratio of the charge, Q on either plate to the potential
different, V between them
Q
C
V
unit: Farad (F)
Q : magnitude of the charge on each plate
V : potential difference across the two plates
Exercise 1
1) When a potential difference of 24 V is applied across a capacitor, the charge on the capacitor is 120 μC. Determine the capacitance of the capacitor [Ans : 5x10-6]
2) Determine the charge on a 300 pF capacitor when it is charged to a voltage of
1.0 KV
[Ans : 3x10-7]
3) Determine the potential difference across a capacitor with 235 μC and
526 nF
[Ans : 446.8]
2.1.2 Capacitor in series & parallel
CAPACITORS
(1) Series
(2) Parallel
2.1.2 Capacitor in series & parallel
Capacitors in series
Figure shows three capacitors are connected in series to a battery of voltage, V
2.1.2 Capacitor in series & parallel
Capacitors in series
The