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Light Sources, Second Edition, 2nd Edition
book

Light Sources, Second Edition, 2nd Edition

by Spiros Kitsinelis, Spyridon Kitsinelis
May 2015
Intermediate to advanced content levelIntermediate to advanced
295 pages
8h 16m
English
CRC Press
Content preview from Light Sources, Second Edition, 2nd Edition
3.2 Low-Pressure Discharge Lamps 59
The dimensions of the electrode and more specically of the tungsten lament
depend on the application of the lamp and its power.
3.2.1.3 The Ballast
An operating gas discharge is a nonlinear circuit element that cannot be described
by Ohm’s law (V=IR) because the conductivity increases with current. The dis-
charge is therefore said to exhibit negative differential voltage-current charac-
teristics, except in some special cases such as weakly ionized plasma. A current
limiting device, called a ballast, is therefore necessary for the operation of dis-
charge lamps. In a discharge tube, the low-pressure gas ...
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Publisher Resources

ISBN: 9781482243673