sample test 1

# sample test 1 - 1-1 2 4 6 8 10 12 t(ms 3b For the voltage...

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ECE200 – 051 Test #1 Summer 2005 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. Find the value of V S given V X = 2V. 10 20 V S + V X - 10 5V
2. In the circuit above, the switch has been closed for a long time and opens at t = 0. a. Draw the t < 0 circuit. Reduce the circuit by combining resistors in series or parallel and find v C (0 - ) and i C (0 - ). b. Draw the t = 0 + circuit and find v C (0 + ) and i C (0 + ). c. Draw the t = circuit and find v C ( ) and i C ( ). i C 10 ½ F 6V + v C - 10 10

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3a. For the signal above, find the peak to peak voltage, DC voltage, period, frequency, and duty cycle. T = f = V DC = V PP = v 2

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Unformatted text preview: 1 -1 2 4 6 8 10 12 t(ms) 3b. For the voltage signal above, find the Amplitude, frequency, DC voltage, and phase shift ( θ may be negative). v(t) = V DC + Acos(2 π ft+ θ ) Volts 4. a. Given v S (t) = 2cos(10t)V in the circuit above, define all branch currents on the circuit diagram above in terms of i 1 and i 2 . b. Write 2 KVL equations and solve for i 1 (t). c. What is the DC value of this current? 20 Ω 5V 10 Ω i 1 v S + 5 Ω i 2 5. a. Is the diode “ON” or “OFF” when v(t) = +10V? b. Find i when v(t) = +10V c. Is the diode “ON” or “OFF” when v(t) = -10V? d. Find i when v(t) = -10V e. Given v(t), plot the current i(t). v +10 -10 10 20 t 6 Ω 6 Ω V γ = 1V + v i 2V...
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## This test prep was uploaded on 03/20/2008 for the course ECE 200 taught by Professor Escuti during the Fall '07 term at N.C. State.

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sample test 1 - 1-1 2 4 6 8 10 12 t(ms 3b For the voltage...

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