ecet345-final_0

# ecet345-final_0 - Week8:FinalExamFinalExam TimeRemaining...

• Test Prep
• titomkubwa
• 13
• 84% (45) 38 out of 45 people found this document helpful

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Question 1. 1. (TCO 1) A sinusoidal signal has an amplitude of 10, frequency of 2 Hz, and initial phase of 60 degrees. It passes through an LTI system and undergoes a gain of 3.5 and a 60-degree phase lag. The resulting output signal will be mathematically described as (Points : 10) 35 sin(4t + 2π/3). 35 sin(4πt - π/3). 35 sin(4πt). 3.5 sin(4πt - π/3). 2A 136983855 77134609 1 False False rldbqn=1 MultipleSections NavigateFreely False /main/CourseMod

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3. (TCO 2) An RLC circuit, with an initial voltage across the capacitor and polarity as marked on the circuit, is shown below. The switch is closed at t = 0 and a current i(t) is assumed to flow clockwise in the circuit. Determine which expression correctly represents the Laplace- transformed value of current, i(s). Note that the coefficient of the highest power of s in the denominator may have to be made unity. 3-A
4-B 5. (TCO 4) A signal consists of only two sinusoids, one of 35 Hz and one of 45 Hz. This signal is sampled at a rate of 230 Hz. Find the first six positive frequencies that will be present in the replicated spectrum. (Points : 10) 35, 45, 185, 195, 265, 275 35, 45, 195, 205, 265, 275 35, 45, 185, 195, 275, 285 35, 45, 185, 195, 265, 295

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6. (TCO 4) A discrete signal or sequence is given in a table below as a function of n or a sample number. All values not shown can be assumed to be zero. Find the z-transform of the signal.
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• Spring '12

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