This document contains solutions to two electrical engineering problems. The first problem calculates the Thevenin voltage, Norton current, and source resistance for a signal source producing different voltages when loaded by different resistors. The second problem fills in a table with the relationships between angular frequency (ω), conventional frequency (f), and period (T) for some example values.

1. 1.23 A particular signal source produces an output of 30 mV when loaded by a 100-k ohm
resistor and 10 mV when loaded by a 10-k ohm resistor. Calculate the Thevenin voltage. Norton
current, and source resistance. 1.27 To familiarize yourself with typical values of angular
frequency omega, conventional frequency f and period T, complete the entries in the following
table:
Solution
1.23 ) by using the
voltage divident rule, let the Rs be the source resistance and V be the input voltage
30m = 100k/(Rs+100k) *V .............(1)
10m = 10K/(Rs+10k) *V ...............(2)
by dividin eq 1 & 2
we get Rs = 28.57 K
and we get V = 38.57 v
so Vth = 38.57 v , Rs = 28.57 k
and nortans IN= 1.35 m A
1.27)
w=2*pi*f
t=1/f
a) . w= 2*pi*f = 2*pi*109 , T = 1/f = 10-9 sec
b) .f= 0.15 *109 , t = 2*pi * 10-9