ELEC 2501 AB. Come to the PASS workshop with your mock exam complete. During the workshop you can work with other students to review your work.

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1 It is most beneficial to you to write this mock midterm UNDER EXAM CONDITIONS. This means: Complete the midterm in 3 hour(s). Work on your own. Keep your notes and textbook closed. Attempt every question. After the time limit, go back over your work with a different colour or on a separate piece of paper and try to do the questions you are unsure of. Record your ideas in the margins to remind yourself of what you were thinking when you take it up at PASS. The purpose of this mock exam is to give you practice answering questions in a timed setting and to help you to gauge which aspects of the course content you know well and which are in need of further development and review. Use this mock exam as a learning tool in preparing for the actual exam. Please note: Come to the PASS workshop with your mock exam complete. During the workshop you can work with other students to review your work. Often, there is not enough time to review the entire exam in the PASS workshop. Decide which questions you most want to review the Facilitator may ask students to vote on which questions they want to discuss in detail. Facilitators do not bring copies of the mock exam to the session. Please print out and complete the exam before you attend. Facilitators do not produce or distribute an answer key for mock exams. Facilitators help students to work together to compare and assess the answers they have. If you are not able to attend the PASS workshop, you can work alone or with others in the class. Good Luck writing the Mock Exam!! Dates and locations of mock exam take-up: Monday, December, 28 :3 am to 2:3 pm at ME3275.

2 . What is the RMS value of the following waveform? a) 37 5 b) 3 5 c) 5 d) 5 2. What is the current, ix, that flows through the 6k resistor? a) 2 ma b) 5 ma c) 3 ma d) 9 ma

3 3. What is the power dissipation from the and 2k resistors? a) P = W, P2k = mw 6 6 b) P = 2 mw, P2k = 2 mw c) P = W, P2k = 2 mw d) P = 2 W, P2k = 2 W 4. What is the current, ix, in the k resistor? Given: R = R br c R a +R b +R c, R 2 = R ar c R a +R b +R c and R 3 = R ar b R a +R b +R c. a) 24 ma b) 6 ma c) 2 ma d) 4 ma

4 5. What equivalent resistance is needed to find the current through the k resistor, ix, when using the Thevenin method? a).2 kω b) 5 Ω c) kω d) Ω 6. What is the matrix equation that is used to obtain the electric potential at points A, B and C? Use the convention that currents going is positive. a) [ 6k 4k] A m [ B] = [ 5m ] C m

5 b) [ 4] A m [ B] = [ 5m] C m c) [ 6k 4k] A m [ B] = [ 5m] C m d) [ 4] A [ B] = [ ] C 7. What value of capacitance or inductance is needed to make the circuit resonate at -3 MHz. The Phasor diagram represents the total voltage across the equivalent source in the circuit and the total current that flows through that source. a) mh Inductor b) 59 μf Capacitor c) 59 μh Inductor d) mf Capacitor

6 8. What is the power dissipation of the current source and the resistor Rx when Rx is designed so that the 5k resistor dissipates 2 mw of power. a) Psource = mw, Px = -8 mw b) Psource = -4 mw, Px = 2 mw c) Psource = - mw, Px = 8 mw d) Wsource = 4 mw, Wx = -2 mw 9. Find the equation that describes the voltage of the capacitor after the switch is closed at t=. a) v(t) = 2 7e t.24 b) b v(t) = 5 + 7e t.24 c) v(t) = 5 + 7e t.8 d) v(t) = 2 + 7e t.8

7 . A user has the circuit as shown to the right of the dotted line. Determine the Thevenin impedance of the circuit designed to provide maximum power transfer to the user when the input AC source is operating at khz. a) Z designed =. j34.35 kω b) Z designed = + j34.35 Ω c) Z designed = j34.35 Ω d) Z designed = j34.35 Ω. The switch is closed at t=s then open again at t=s. Find the charge stored on the capacitor plates when t=s. a) 8 mc b) 8 μc c) μc d) mc

8 2. The following circuit has been provided. At what frequency will maximum power transfer occur? a) At all frequencies b) Hz c) Never d) khz 3. Given the following Bode magnitude plot with asymptotes determine the transfer function. a) H(jω) = 4(jω +)(jω 5 +)(jω 6 +) (jω 2 +)(jω 3 +)(jω 7 +) b) H(jω) = (jω +)(jω 5 +)(jω 6 +) (jω 2 +)(jω 3 +)(jω 7 +) c) H(jω) = (jω +)(jω 5 +)(jω 6 +) (jω 2 +)(jω 3 +)(jω 7 +) d) H(jω) = (jω2 +)(jω 3 +)(jω 7 +) (jω +)(jω 5 +)(jω 6 +)

9 4. What is he phase shift of the output of a filter which has the following transfer function when the angular frequency is. rads/sec? The value of the asymptote is needed not the actual value. a) degrees b) degrees c) -3.5 degrees d) 22.5 degrees H(jw) = 2 (jω + ) (jω5 + ) 5. What is the Thevenin equivalent model one must use if one wishes to analyze a larger circuit which the given circuit is a part of? a) V th =.5 o, Z th =. + j99 Ω b) V th = o, Z th =. j99 kω c) V th = o, Z th =. j99 Ω d) V th =.5 o, Z th =. j99 Ω

10 6. At what frequency will the following circuit have the largest gain? a) 25 khz b) 25 Hz c) 258 Hz d) 2.58 khz 7. The source is set to have a frequency of 59.2 Hz what is the current, Ix, that flows through the 25 μf capacitor? a) 6 ma b) 2 ma c) ma d) 8 ma

11 8. Given Q = ω L R for series resonate circuits and Q = R the bandwidth of the following circuit? ω L for parallel circuits what is a) 59 k rad/sec b) 6.28 MHz c) MHz d) M rad/sec

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