Skip to Main Content
Modern Electrical Installation for Craft Students, 3rd Edition
book

Modern Electrical Installation for Craft Students, 3rd Edition

by Brian Scaddan
November 2013
Intermediate to advanced content levelIntermediate to advanced
182 pages
6h 6m
English
Newnes
Content preview from Modern Electrical Installation for Craft Students, 3rd Edition
26 Capacitors and capacitance
C = d + C
2
+ C
3
= 60 + 40 + 24
= 124/iF
Total charge Q = C χ V
= 124 χ 10"
6
x 500
= 62 mC
Qi= C
X
V
= 60 x 10"
6
x 500
= 30 mC
Q
2
= C
2
V
= 40 χ ΙΟ"
6
x 500
= 20 mC
03=
C
Z
V
= 24 χ ΙΟ"
6
x 500
= 12 mC
Energy stored in a capacitor
The amount of energy stored in a capacitor, is expressed in joules and is
given by:
W =
V2CV
2
Capacitors in d.c. circuits
A capacitor connected across a d.c. supply is shown in Diagram 31a.
The curves of the current and voltage in the circuit are shown in Diagram
31b.
As the capacitor begins to charge, its voltage increases until it is
equal to the supply voltage. At the same time the charging
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Electrical Calculations and Guidelines for Generating Station and Industrial Plants

Electrical Calculations and Guidelines for Generating Station and Industrial Plants

Thomas E. Baker

Publisher Resources

ISBN: 9781483106205