ECE200
Homework #5
Due: July 8
1.
The signal below is the current through a 10K
Ω
resistor.
a.
Sketch the instantaneous power, p(t).
b.
Calculate I
RMS
.
c.
Calculate V
RMS
d.
Find the real power, P.
e.
Find the apparent power, S.
2.
Given a voltage of 5cos(500t) V is across a 3μF capacitor.
a.
Determine the instantaneous power, p(t).
b.
Calculate I
RMS
.
c.
Calculate V
RMS
d.
Solve for the real power, P.
e.
Solve for the apparent power, S.
f.
Determine the power factor.
3.
Given the load voltage (larger amplitude signal) and current plots below,
a.
Calculate the apparent power.
b.
Calculate the real power.
c.
Calculate the power factor.
i(mA)
9
6
3
3
6
10 20 30 40
50
60
t(ms)
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4&5.
The diode in circuit below has a 2V turn on voltage. This is a 20 point problem
instead of 10 points!
a.
Sketch the current through the 4V source.
b.
Sketch the instantaneous power delivered to the 4V source.
c.
Determine the real power delivered to the 4V source.
d.
Determine the RMS current through the 3K
Ω
resistor.
e.
Determine the real power delivered to the 3K
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 Summer '07
 Escuti
 50%, 3k, 5k, 6k

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