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sample test 2

# sample test 2 - ECE200 Test#2 Print Name By signing I am...

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ECE200 Test #2 Print Name ________________________________________ By signing I am stating that I have taken this quiz in accordance with the NCSU honor code. Signature __________________________________________

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1. (10 points) For the voltage signal shown above, a. What voltage would be recorded on a voltmeter in the DC mode? b. What voltage would be recorded on a voltmeter in the AC mode? c. Calculate the power this signal would deliver to a 2K resistor. v +10 +5 -5 2 4 6 8 10 12 14 16 t(ms)
2. (10 points) Given the voltage and current signals above, a. Determine the RMS voltage. b.Determine the RMS current. c. Determine the power factor. d.Calculate the apparent power. e. Calculate the real power. v i

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3. (15 points) From the oscilloscope display (top signal) and power spectrum (bottom signal) of the signal above, a. Determine the fundamental frequency of the signal. b. Find the frequency span used to display this spectrum. c. Find the power in the 3 rd harmonic in Watts (center screen is the offset).
4. (25 points) Given the signal: ) 4 / 2000 2 cos( 6 ) 500 2 cos( 10 8 ) ( π π π + = t t t v a. Plot the power spectrum in dBW.

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