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Maria Tsiolkas
Physics 212l:207
Capacitors
September 18, 2008
September 25, 2008
Amanda Jeffries
Tim Lingman
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View Full Document Introduction
The purpose of this lab is to explore how charge and energy are
stored in both series and parallel combinations of capacitors and to investigate
how those combinations compare in terms of stared charge and stored energy.
A
capacitor is a physical device that store electric charge and energy.
Useful Equations
Q = C ·ΔV
E =1/2C(ΔV )²
E=1/2Q · ΔV
ΔV1=ΔV2=ΔVbattery(prarallel
Q
total
= Q
1
+ Q
2
(parallel)
C
total
= C
1
+ C
2
(parallel)
Etotal=1/2Ceq(ΔV)
²=1/19C1+C2)( ΔV) ²=1/2C1(ΔV) ² + 1/2C2(ΔV) ²
(parallel)
Q
total
= Q
1
= Q
2
(series)
ΔVbattery=ΔV1+ΔV2
1/Ceq=1/C1+1/C2
(series)
ΔV
battery
=(Q
total/
C
eq
),ΔV
1
=(Q
total/
C
1
), ΔV
2
=(Q
total/
C
2
) (series)
E
total
=1/2Q
total
ΔV
battery
=1/2Q
total
(ΔV
1
+ ΔV
2
) =1/2Q
total
ΔV
1
+1/2Q
total
ΔV
2
(series)
Data
Series LED discharge time: 4 seconds
Parallel LED discharge time: 16 seconds
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This note was uploaded on 04/13/2009 for the course PY 212 taught by Professor Chilton during the Spring '08 term at N.C. State.
 Spring '08
 Chilton

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