Electrical Engineering: Principles & Applications (7th Edition)
7th Edition
ISBN: 9780134484143
Author: Allan R. Hambley
Publisher: PEARSON
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Chapter 9, Problem 9.5P
Compute the values of
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Q1: For the circuits shown in figures. If the temperature has changed from 25°C to 65°C. find
AIc. Ic=1.5mA at 25°C.
Vcc
+20v
25°C
65°C
47k
33.9k
55
70
Ico
InA
16nA
12knS
VBE 0.6
0.5
S1.2k
Two heating elements which is 500 ohms and 250 ohms are connected in series with temperature coefficients of 0.001 and 0.003 ohms per °C, respectively at 20°C and heated at 50°C, Calculate the effective temperature coefficient of the combination at 20°C
A copper-oxide rectifier and a non-inductive resistance of 20 Ω are connected in series across a sinusoidal a.c. supply of 230 V (r.m.s.). The resistance of the rectifier is 2.5 Ω in forward direction and 3,000 Ω in the reverse direction. Calculate the r.m.s. and average values of the current.
Answer: [r.m.s. value = 5.1 A, average value = 3.22 A]
Chapter 9 Solutions
Electrical Engineering: Principles & Applications (7th Edition)
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- Clear solutions pls. Thank you Given the following Resistances and Capacitors in Series and Voltage Source: R1 = 1 ohms R2 = 10 ohms C1 = 0.007 Farad C2 = 0.008 Farad Vs = 9 Volts Frequency = 6 Hz What is the Total Reactance in ohms?arrow_forwardPlease show complete solution 1 hour leftarrow_forwarda) What is the peak voltage across R2? b) What is the RMS value of I1?arrow_forward
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