EE 98: Fundamentals of Electrical Circuits - With Connect Access
6th Edition
ISBN: 9781259981807
Author: Alexander
Publisher: MCG
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Textbook Question
Chapter 11, Problem 1P
If v(t) = 160 cos 50t V and i(t) = −33 sin (50t − 30°)A, calculate the instantaneous power and the average power.
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Question 2
A transistor is used as a switch and the waveforms are shown in Figure 2. The parameters are
Vcc = 225 V, VBE(sat) = 3 V, IB = 8 A, VCE(sat) = 2 V, Ics = 90 A, td = 0.5 µs, tr = 1 µs, ts = 3 µs, tƒ
= 2 μs, and f
10 kHz. The duty cycle is k 50%. The collector- emitter leakage current is
ICEO = 2 mA. Determine the power loss due to the collector current:
=
=
=
(a) during turn-on ton = td + tr
VCE
Vcc
(b) during conduction period tn
V CE(sat)
0
toff"
ton
Ics
0.9 Ics
(c) during turn-off toff = ts + tf
(d) during off-time tot
(e) the total average power losses PT
ICEO
0
IBS
0
Figure 2
V BE(sat)
0
主
*
td
tr
In
Is
If
to
iB
VBE
T= 1/fs
Question 1:
The beta (B) of the bipolar transistor shown in Figure 1 varies from 12 to 60. The load resistance
is Rc = 5. The dc supply voltage is VCC = 40 V and the input voltage to the base circuit is
VB = 5 V. If VCE(sat) = 1.2 V, VBE(sat) = 1.6 V, and RB = 0.8 2, calculate:
(a) the overdrive factor ODF.
(b) the forced ẞ
(c) the power loss in the transistor PT.
IB
VB
RB
+
V BE
RC
Vcc'
Ic
+
IE
Figure 1
VCE
I need help in creating a matlab code to find the currents
Chapter 11 Solutions
EE 98: Fundamentals of Electrical Circuits - With Connect Access
Ch. 11.2 - Calculate the instantaneous power and average...Ch. 11.2 - A current A flows through an impedance Find the...Ch. 11.2 - In the circuit of Fig. 11.4, calculate the average...Ch. 11.2 - Calculate the average power absorbed by each of...Ch. 11.3 - For the circuit shown in Fig. 11.10, find the load...Ch. 11.3 - In Fig. 11.12, the resistor RL is adjusted until...Ch. 11.4 - Find the rms value of the current waveform of Fig....Ch. 11.4 - Find the rms value of the full-wave rectified sine...Ch. 11.5 - Prob. 9PPCh. 11.5 - Prob. 10PP
Ch. 11.6 - For a load, Determine: (a) the complex and...Ch. 11.6 - A sinusoidal source supplies 100 kVAR reactive...Ch. 11.7 - In the circuit in Fig. 11.25, the 60- resistor...Ch. 11.7 - Two loads connected in parallel are respectively 3...Ch. 11.8 - Find the value of parallel capacitance needed to...Ch. 11.9 - For the circuit in Fig. 11.33, find the wattmeter...Ch. 11.9 - The monthly reading of a paper mills meter is as...Ch. 11.9 - An 500-kW induction furnace at 0.88 power factor...Ch. 11 - The average power absorbed by an inductor is zero,...Ch. 11 - The Thevenin impedance of a network seen from the...Ch. 11 - The amplitude of the voltage available in the...Ch. 11 - If the load impedance is 20 j20, the power factor...Ch. 11 - A quantity that contains all the power information...Ch. 11 - Reactive power is measured in: (a) watts (b) VA...Ch. 11 - In the power triangle shown in Fig. 11.34(a), the...Ch. 11 - For the power triangle in Fig. 11.34(b), the...Ch. 11 - A source is connected to three loads Z1, Z2, and...Ch. 11 - The instrument for measuring average power is the:...Ch. 11 - If v(t) = 160 cos 50t V and i(t) = 33 sin (50t ...Ch. 11 - Given the circuit in Fig. 11.35, find the average...Ch. 11 - A load consists of a 60- resistor in parallel with...Ch. 11 - Using Fig. 11.36, design a problem to help other...Ch. 11 - ssuming that vs = 8 cos(2t 40) V in the circuit...Ch. 11 - For the circuit in Fig. 11.38, is = 6 cos 103t A....Ch. 11 - Given the circuit of Fig. 11.39, find the average...Ch. 11 - In the circuit of Fig. 11.40, determine the...Ch. 11 - For the op amp circuit in Fig. 11.41, Find the...Ch. 11 - In the op amp circuit in Fig. 11.42, find the...Ch. 11 - For the network in Fig. 11.43, assume that the...Ch. 11 - For the circuit shown in Fig. 11.44, determine the...Ch. 11 - The Thevenin impedance of a source is ZTh = 120 +...Ch. 11 - Using Fig. 11.45, design a problem to help other...Ch. 11 - In the circuit of Fig. 11.46, find the value of ZL...Ch. 11 - For the circuit in Fig. 11.47, find the value of...Ch. 11 - Calculate the value of ZL in the circuit of Fig....Ch. 11 - Find the value of ZL in the circuit of Fig. 11.49...Ch. 11 - The variable resistor R in the circuit of Fig....Ch. 11 - The load resistance RL in Fig. 11.51 is adjusted...Ch. 11 - Assuming that the load impedance is to be purely...Ch. 11 - Find the rms value of the offset sine wave shown...Ch. 11 - Using Fig. 11.54, design a problem to help other...Ch. 11 - Determine the rms value of the waveform in Fig....Ch. 11 - Find the rms value of the signal shown in Fig....Ch. 11 - Find the effective value of the voltage waveform...Ch. 11 - Calculate the rms value of the current waveform of...Ch. 11 - Find the rms value of the voltage waveform of Fig,...Ch. 11 - Calculate the effective value of the current...Ch. 11 - Compute the rms value of the waveform depicted in...Ch. 11 - Find the rms value of the signal shown in Fig....Ch. 11 - Obtain the rms value of the current waveform shown...Ch. 11 - Determine the rms value for the waveform in Fig....Ch. 11 - Find the effective value f(t) defined in Fig....Ch. 11 - One cycle of a periodic voltage waveform is...Ch. 11 - Calculate the rms value for each of the following...Ch. 11 - Design a problem to help other students better...Ch. 11 - For the power system in Fig. 11.67, find: (a) the...Ch. 11 - An ac motor with impedance ZL = 2 + j 1.2 is...Ch. 11 - Design a problem to help other students better...Ch. 11 - Obtain the power factor for each of the circuits...Ch. 11 - A 110-V rms, 60-Hz source is applied to a load...Ch. 11 - Design a problem to help other students understand...Ch. 11 - Find the complex power delivered by vs to the...Ch. 11 - The voltage across a load and the current through...Ch. 11 - For the following voltage and current phasors,...Ch. 11 - For each of the following cases, find the complex...Ch. 11 - Determine the complex power for the following...Ch. 11 - Find the complex power for the following cases:...Ch. 11 - Obtain the overall impedance for the following...Ch. 11 - For the entire circuit in Fig. 11.70, calculate:...Ch. 11 - In the circuit of Fig. 11.71, device A receives 2...Ch. 11 - In the circuit of the Fig. 11.72, load A receives...Ch. 11 - For the network in Fig. 11.73, find the complex...Ch. 11 - Using Fig. 11.74, design a problem to help other...Ch. 11 - Obtain the complex power delivered by the source...Ch. 11 - For the circuit in Fig. 11.76, find the average,...Ch. 11 - Obtain the complex power delivered to the 10-k...Ch. 11 - Calculate the reactive power in the inductor and...Ch. 11 - For the circuit in Fig. 11.79, find Vo and the...Ch. 11 - Given the circuit in Fig. 11.80, find Io and the...Ch. 11 - For the circuit in Fig. 11.81, find Vs.Ch. 11 - Find Io in the circuit of Fig. 11.82. Figure 11.82Ch. 11 - Determine Is in the circuit of Fig. 11.83, if the...Ch. 11 - In the op amp circuit of Fig. 11.84, vs = 4 cos...Ch. 11 - Obtain the average power absorbed by the 10-...Ch. 11 - For the op amp circuit in Fig. 11.86, calculate:...Ch. 11 - Compute the complex power supplied by the current...Ch. 11 - Refer to the circuit shown in Fig. 11.88. (a) What...Ch. 11 - Design a problem to help other students better...Ch. 11 - Three loads are connected in parallel to a rms...Ch. 11 - Two loads connected in parallel draw a total of...Ch. 11 - A 240-V rms 60-Hz supply serves a load that is 10...Ch. 11 - A 120-V rms 60-Hz source supplies two loads...Ch. 11 - Consider the power system shown in Fig. 11.90....Ch. 11 - Obtain the wattmeter reading of the circuit in...Ch. 11 - What is the reading of the wattmeter in the...Ch. 11 - Find the wattmeter reading of the circuit shown in...Ch. 11 - Determine the wattmeter reading of the circuit in...Ch. 11 - The circuit of Fig. 11.95 portrays a wattmeter...Ch. 11 - Design a problem to help other students better...Ch. 11 - A 240-V rms 60-Hz source supplies a parallel...Ch. 11 - Oscilloscope measurements indicate that the peak...Ch. 11 - A consumer has an annual consumption of 1200 MWh...Ch. 11 - A regular household system of a single-phase...Ch. 11 - A transmitter delivers maximum power to an antenna...Ch. 11 - In a TV transmitter, a series circuit has an...Ch. 11 - A certain electronic circuit is connected to a...Ch. 11 - An industrial heater has a nameplate that reads:...Ch. 11 - A 2000-kW turbine-generator of 0.85 power factor...Ch. 11 - The nameplate of an electric motor has the...Ch. 11 - As shown in Fig. 11.97, a 550-V feeder line...Ch. 11 - A factory has the following four major loads: A...Ch. 11 - A 1-MVA substation operates at full load at 0.7...Ch. 11 - Prob. 95CPCh. 11 - A power amplifier has an output impedance of 40 +...Ch. 11 - A power transmission system is modeled as shown in...
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