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Unformatted text preview: EE302 Fall 2009 HWlO—Final Review
This homework is optional. If you do it, this grade will be used to
replace your lowest single homework grade. Problem 1. Conceptual Problems
a) In the circuit below, resistor R is increased. What happens to the following quantities? (Circle the appropriate answer.) If
V 0
0 Power dissipated in R1 increases decreases stays the same
0 Power dissipated in R2 increases stays e same
0 Power supplied by voltage source increases stays the same
0 stays the same Voltage across R3 increases b) Find the power associated with each element in the circuit below. State whether
each source is supplying or absorbing power. c) For the circuit below, VA and V}; are deﬁned relative to the reference node as
shown. Find the requested quantities. SwitchesAandB VA: 5.00 VB: 5.00]
are Open Power dissipated in R1: Switch A is VA = 5» 00V 5 Power dissipated
closed, B is oen in R1= _ Power dissip
in R1=
Power dissipated in R1: l/m/ VB = OO
Switch A is open, VA = 5, 00V VB = 2. 50
B is closed I
Switches A and B VA = 3 . 35 VB = .63V
are closed Switch A VA VB
109 109 100
R1 4.
5V
4. I
5V  I éSwlchB I o+73+ lo :0
5
V5(ﬁ>_ \
no
\IB "—3 : Problem 2. The resistor RL is adjusted for maximum power transfer to RL.
a) Find the value of RL. b) Find the maximum power that can be delivered to RL. Answer hint:
Vth = 10.0 V 50.0V othr‘ +r‘4 n5€W =Ie..01L in.— mm?
V9?“
LlQTH \o" _
= W' “W Problem 3. Find the equivalent resistance of the network below. Problem 4. R0 is adjusted for maximum power transfer. What percentage of the
total power developed in the cirCuit is delivered to R0? Answer: Percentage delivered
to R0 = 3.77% 33:1“: QBA
Wm” Um = 5509 45". Put Ra Iﬁﬁé’. 33‘12—213:4.4 5I55 = LLB‘ESSQ Sll‘ll” ~11 F331 + C1.5$313,:o
I — 5838A TIL2 90.9(0A jg: 40:74.4
l“ . P4” = HALU. ="Z7é2a3w Pad: — +2.4 11x): B‘séw Vx 41.4 +£32.13 + sag—19:0
W 42.4  (I1*I,)—3C:l‘1~133: /40../\/ H . Z‘k .
Problem 5. ﬁnd Vg usmg: V15 = 600V
a) superpos1t10n
b) a series of source transformations ’z‘ojl Problem 6. Using node voltage analysis, write the node equations in standard form for
the following circuit. 1 1 1 V — —V —— +V — =11—12
ARI) ARI) C(R3) VA —0.8V3 HVC =0 1 —1 1
V — +V —+— :12
ARI) 3(R1 R2) Problem 7. Using mesh current analysis, ﬁnd VA and the total power dissipated in the
following circuit. Make certain your equations are in standard form. Ci) 2 \IX: Ia‘o
, , _I —0.%\/1§ + Q5 __
(36“IQRZ + Cl; U ‘“ — 0.% (34:092. ” . cg mmﬁm +81% “ O Problem 8. Determine the closed—loop gain Av=VofVi for the circuit below. Av=VoNi=O.800 Q": : AN“? O.%OD Problem 9. For the circuit below, ﬁnd Ix. ...
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 Fall '06
 MCCANN
 Electrical Engineering, Volt, Mesh Analysis, Resistor, SEPTA Regional Rail, Voltage drop

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