Skip to Main Content
Newnes Circuit Calculations Pocket Book
book

Newnes Circuit Calculations Pocket Book

by Thomas J. Davies
April 2016
Intermediate to advanced content levelIntermediate to advanced
384 pages
12h 56m
English
Newnes
Content preview from Newnes Circuit Calculations Pocket Book
d.c. circuits 45
V-
Figure
3.13
10 PRINT "PROG 47"
20 PRINT "THIS PROGRAM SOLVES EXAMPLE 23"
30 INPUT "ENTER F.S.D. CURRENT IN MILLIAMPS" ; IC
40 INPUT "ENTER COIL RESISTANCE" : RC
50 INPUT "ENTER MAXIMUM CURRENT READING IN AMPS" ; I
60 LET V=IC*RC/1000
70 LET IRS=I-(IC/1000)
80 LET RS=V/IRS
90 PRINT "SHUNT RESISTANCE VALUE = " RS "OHMS"
(c) Wattmeter
Wattmeters are used to measure the true power consumed in a.c.
and d.c. circuits. In a.c. circuits
True power = VI cos
<J>
where
V = the r.m.s. value of the applied voltage
/ = the load current.
<$>
= the phase angle between the voltage and the current.
A.c.
voltages are discussed in Chapter 6
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

Power Supplies for LED Driving, 2nd Edition

Power Supplies for LED Driving, 2nd Edition

Steve Winder

Publisher Resources

ISBN: 9781483101132