
92 Circuit calculations pocket book
10
PRINT "PROG 55"
20
PRINT "INSTANTANEOUS
VALUES"
30
INPUT "ENTER MAXIMUM
VALUE"
: E
40
INPUT "ENTER ANGLE IN DEGREES" : X
50
LET V=E*SIN(X*3.141593/180)
60
PRINT "INSTANTANEOUS VOLTAGE = " V
"VOLTS"
6.4
Peak, peak to peak, and r.m.s. values
A cathode ray oscilloscope (CRO) is used to view a voltage
waveform, and to measure the peak voltage (K
p
) (Figure 6.4),
which is the amplitude. Note that the peak to peak voltage
Vp/p = 2V
p
(K
p
is the maximum value). A.c. voltmeters, both
analogue and digital, will read the r.m.s. (root mean squared)
value. The r.m.s. value of the voltage is equal to the value of a d.c ...