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Unformatted text preview: ECEZOO
Test #3 Print Name K e 5 By signing I am stating that I have taken this quiz in accordance with the
NCSU honor code. Signature VJV) D 10 20 ‘ [(#5) 10 l. The voltage across a 9K0 resistor is plotted above. a. Determine the voltage that would be recorded on a voltmeter in the DC mode? 5ts>+£40>00>+mw> “E. , ’
Vagiw‘uéi a? /’ 15’ / 5V b. Determine the voltage that would be recorded on a voltmeter in the AC mode?
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<95” c. Determine the current that would be recorded on an ameter in the DC mode?
\Ic) c ’ 5 v. ‘ l \/w\ R d. Determine the current that would be recorded on an ameter in the AC mode? :KMs I VKmS/Q : [lit/56% MR “' /?> MR e. Calculate the power delivered to the 9K resistor. P;m: ﬁng; K l 9K0 Vy=2V 2. Given the input to the half wave rectiﬁer shown above, d 3 k) a. Plot the voltage across the diode and solve for the RMS value of this voltage. A Calming
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. ' r :_ M; ’\(\ «full 0. Plot the instantaneous power delivered to the diode. d. Calculate the real power absorbed by the diode. P: {DOCS ": VWAVK) 4 3. Answer the following independent questions: 21) Given: v(t) = 20cos(500nt + n/3) V and i(t) = 3cos(500nt  713/6) mA Determine the real power delivered to the load. 3 ,_<T\'TV
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b) Given: V(t) = 6 + 8cos(2000nt + rc/6) V is the voltage across a 2K9 resistor
Calculate the real power delivered to the resistor. 1. L _‘L+—K8/EB=(03
c) Given: i(t) = 3 + 2cos(2000nt  7r/3) mA is the current ﬂowing through a 2K9 resistor
Calculate the real power delivered to the resistor. ‘2’ ‘ 51
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P 1 :Rm5 R :Rms K P ;: (1) Given: v(t) = 8cos(20007rt + n/6) V is the voltage across a 20uF capacitor Calculate the real power delivered to the capacitor. 9V ‘9: 3 TV/: %‘\i\ce Cat? Lood :3 9:0 4. From the oscilloscope display (top signal) and power spectrum (bottom signal) of the
signal above, a. Determine the fundamental frequency of the signal. TLZUVWCT) 50 Q _ /Z KRE QJNX '
b. Determine the center frequency of the displayed power spectrum. P: pew/so good (:2) Q€ﬂ¥K:'5*SO€D: ZaSWi— c. Calculate the RMS voltage of this signal. You will need to decide if this is easier
to get from the time domain or freq. domain representation of the signal. \{Kms : 5V Ennoﬁ ‘33“: L‘S Z : lg' [h d. Determine the power in the 5 harmonic in Watts. »—3 PS: “godEUO : \O ..
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C/ UQ 5. Given the signal: v(t) = [—20 + 30 cos(27180t) — 10 cos(27z240t + 7: / 3)] V a. Plot the power spectrum in dBW. b. Determine the RMS voltage of the signal. VELng OIOQV 3' \©\o3\lai:\s : towcﬁoo :aﬁsoleco (1. Noise is added to this signal such that the signal to noise ratio is 40dB. Calculate the Noise powerin dBW.
6NK: EMT/35m : dgws — cl,%\>bo so asses: dew, “EUR :aQSwDJIW 6. Given the signal power spectrum in dBW below, write an equation for the signal v(t). : ' l 3
You will need to use 01, 02, and 03 for the phase information since this is not given.
dBWSig +20 10 —20 2000 4000 6000 f(Hz) I‘LN glib
7]&A:QE§+\©l§(&ﬁ(®ﬂkﬁxaﬁw%33 +62<Xﬁhmﬂﬁtkﬂl*®5>lv ...
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 Summer '07
 Escuti
 Power, real power

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