Transcript quizzess01
EE211 Quizzes Spring 2001 Instructor: Dr. K.D. Donohue Quiz 1 Find the power absorbed or supplied by each element in the circuit below. Use only the formulas and concepts from Chapter 1 to solve. (Show work). Ix = 6 A + 4V _ + 2V 1 I1 = 4 A 2 1 Ix 3 Quiz 2 Find the current Io in the circuit below. Ix 12 Io 2A 8 -0.5Ix Quiz 3 Given Vs = 10 V, find Vo in the circuit below: 8k 2k VS 12k 4k + Vo - Quiz 4 A) (2 points) Find Vo by nodal analysis. B) (2 points) Find Io by loop analysis. + Vo 15 60 Io 30 + Vd 2V 20 Vd 15 Quiz 5 Use Norton’s theorem to find I0 in the Circuit below: 12V 3 2A 6 Io 3 3 Quiz 6 Given vi(t) = 10sin(20t) V, find vo(t). 10 k 1 F vi(t) + vo(t) - Quiz 7 (Take Home) This is due Thursday March 1, 2001 at the beginning of the class period. Students must work independently on this assignment, NO COLLABORATION. Any detected cheating will result in an E for the course for all involved parties. You are free to use any books, notes, or computer programs to solve this. If you get a result from a computer or calculator program (i.e. to solve a system of equations), indicate the program used to obtain the result. Otherwise all work done to obtain the result should be clearly shown. A. Derive a set of equations that describe a complete set of node voltages or loop currents in the circuit below (2 points). B. Use the set of equations to find Va (0.5 points). C. Simulate the circuit in SPICE and determine Va (submit printout of SPICE schematic with correct meter reading for Va) (1.5 points). 10 mA 5 k 50 k 10 k + Va - 2 k 0.5 Ia 30 k 5V Ia 25 k 1 k 3Va 10 k Quiz 8 Determine equation for vo(t) for t > 0. 8k t=0 + 6V 6k vo(t) - .05mF Quiz 9 Find the equation for i(t), for t > 0, assume voltage on capacitor is 0 for t = 0- t=0 10 V 7 10 10 F 6 i(t) 1 H 10 Quiz 10 (Take Home) This is due Thursday March 29, 2001 at the beginning of the class period. Students must work independently on this assignment, NO COLLABORATION. Any detected cheating will result in an E for the course for all involved parties. You are free to use any books, notes, or computer programs to solve this. If you get a result from a computer or calculator program (i.e. to solve a system of equations), indicate the program used to obtain the result. Otherwise all work done to obtain the result should be clearly shown. (a) Use SPICE to plot vo(t) for t > 0. The time axis should be long enough to show voltage has reached an effective steady-state. Hand in a hardcopy of the circuit drawn in SPICE and the plot. Also email me the SPICE circuit as an attachment by the due date. If you used a program other than B2SPICE, please indicate that in your email (3 points) (b) Find complete solution for vo(t) for t > 0 analytically. (1 point) 1 k 19 + vo(t) - 5[u(t)-u(t-0.1)] V 0.1 mF 0.1 H Quiz11 For vs(t) = 10cos(100t) V A) Draw frequency domain circuit (2pts) B) Find io(t) (steady-state) (2pts) 0.4 H io vs 20 0.5 mF Quiz 12 1) Find the phasor quantity for io in the circuit below.(1.5) 2) Draw and label the phasor diagram for the voltages over each element in this loop. (1.5) 3) Describe in words what happens to vo as the frequency of the source increases. (1) io 10 cos(100 t 45 ) V 1mF 8 vo Quiz 13 a) Find the Thévenin equivalent circuit ( Vˆs and ẐTH ) in terms of phasors and impedances wrt terminals C and B (note: Remove 1 load resistor first). (3 points) b) Use equivalent circuit to find VˆCB when 1 load resistor is replaced (1 point) C 2 2 j1 j 2 60 A 1 Vˆ CB B C Thévenin’s Equivalent Circuit Vˆs Ẑ TH B Quiz 14 Take Home This is due Tuesday Dec. 5, 2000 at the beginning of the class period. Students must work independently on this assignment, NO COLLABORATION. Any detected cheating will result in an E for the course for all involved parties. Hand in a hard copy of the circuit and tables from SPICE that clearly show the requested results (can print directly from SPICE or paste into another program and print). Email the SPICE circuit file used in the simulation to [email protected] before 12/5/00 at 2pm. If you used a software package other than B2 SPICE, please indicate that in your email. Also make sure your name is somewhere on the email. Use SPICE to find the phasors for the steady-state response of vo(t), when fo = 1, 10, 100, 225, and 1000 Hz. The magnitudes should be linear (i.e not in dB) and phase should be in degrees. 0.1 F 20 k 5 k 1 cos2f ot V 2 0.1 F 5 k 5 k + vo(t) -