Capacitors A capacitor is a device for storing charge and electrical potential energy.
electrical potential and capacitors
-
Upload
pksoniiitphysics -
Category
Documents
-
view
215 -
download
0
Transcript of electrical potential and capacitors
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 1/30
A
Electric Potent
Chap
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 2/30
B
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 3/30
+
+
+
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 4/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 5/30
4.00 m
C y
2.00 C
P
3.00 m
µ
µ
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 6/30
E
q
+
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 7/30
a a
y
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 8/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 9/30
dq
a
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 10/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 11/30
(a) +
++ +
+ ++
+
R
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 12/30B
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 13/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 14/30
+Q
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 15/30
+Q
Q
(a)
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 16/30
b
a
a
Q
b
r
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 17/30
Capacitor
symbol
C1
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 18/30
C 2
C 1
Q 2
C 2
Q 1
C 1
∆V 1 = ∆V 2 = ∆V
C
C2C1
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 19/30
(a)
+ –
C 2
∆V
C 1∆V 1 ∆V 2
+Q –Q +Q –Q
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 20/30
a
F I GURE 5.25 (Example 5.8) To find the
equivalent combination of the capacitors in (a),
the various combinations are reduced in steps as
indicated in (b), (c), and (d), using the series and
parallel rules described in the text. Allcapacitance values are in microfarads.
C
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 21/30
Q 1i +
b a
C 1
S1 S2
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 22/30
C 0 Q 0
+–
+
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 23/30
)b(
– +
– +
– +
–
+
– +
– + –
+
–+
– +
– +
– + –
+
– +
– +
–+
– +
– + –+
– + – +
(a)
+
+
+
+
+
+
F IGURE 5.28 (a) Polar molecules are randomly orie
external electric field is applied, the molecules partially
modeled as an additional pair of parallel plates establish
Q
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 24/30
+
Q 0C 0
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 25/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 26/30
k m
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 27/30
20.0 nC
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 28/30
8/9/2019 electrical potential and capacitors
http://slidepdf.com/reader/full/electrical-potential-and-capacitors 29/30
∆V
Stud