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Foundations of Wireless and Electronics, 10th Edition
book

Foundations of Wireless and Electronics, 10th Edition

by M. G. Scroggie, S. W. Amos
October 2013
Intermediate to advanced content levelIntermediate to advanced
570 pages
27h 46m
English
Newnes
Content preview from Foundations of Wireless and Electronics, 10th Edition
41
The same milliammeter can of course be used for measuring
currents up to 1mA by connecting it in series in the current path; but
to avoid increasing the resistance of the circuit more than need be,
the voltage resistances would have to be short-circuited or otherwise
cut out. Care must be taken never to connect a current meter directly
across a voltage source, for its low resistance might pass sufficient
current to destroy it. Higher currents can be measured by diverting
all but a known fraction of the current through a bypass resistance
called a shunt. If, for example, the resistance of the 0—1
milliammeter is 75Ω, shunting it with 75/
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Publisher Resources

ISBN: 9781483105574