Problem 1 Find the Thevenin equivalent resistance Rth for the circuit below at terminals A B a 7 b 3 c 2 d 3 e 7 Problem 2 For the circuit below the short circuit current Isc in the Norton equivalent circuit is a 1 A b 2 A c 3 A d 4 A e 5 A Problem 3 For the inductor circuit below iL 0 0 The inductor current iL t in A is 5t a 2 2e b 10 10e 5t c 10e 5t 10 d 2e 5t 2 Problem 4 The equivalent capacitance Ceq for the circuit below is a 1 F b 2 F c 3 F d 4 F e 5 F 5t e 50e 50 Problem 5 The maximum amount of power is transferred to the load resistor RL when RL a 5 b 7 5 c 10 d 40 e 55 Problem 6 Two sets of measurements were taken for the linear resistive network shown below see table below If Vs1 2V and Is2 4A then Vx a 2 V Vs1 10 V 0V b 0 V Is1 0A 5A Vx 20 V 5V c 2 V d 5 V e 20 V Problem 7 For the circuit shown below the value of Vx in volts is a 0 b 3 sin t c 5 sin t d 10 sin t e 15 sin t Problem 8 What value of V2 gives the relation Vo 2V1 15 a 1V b 2V c 3V d 4V e 5V Problem 9 The Thevenin equivalent circuit seen by the variable load resistor at terminals A B is a b c d e Voc 10V Rth 0 5 Voc 10V Rth 2 Voc 10V Rth 2 Voc 10V Rth 2 Voc 10V Rth 5 Problem 10 For the circuit below VR 6V find the value of VR if Iin is changed from 3 A to 6 A a 1 V b 3 V c 6 V d 12 V e 24 V Problem 11 Consider the circuit below and find Vc 0 a 50V b 100V c 0V d 50V e 100V Problem 12 Find the time constant for the circuit in Problem 11 valid for 0 t 10 sec a 1 sec b 2 sec c 3 sec d 4 sec e 5 sec Problem 13 Find the current iout a 0 4 mA b 0 2 mA c 0 mA d 0 2 mA e 0 4 mA Problem 14 Assume an ideal operational amplifier and that the capacitor is uncharged at t 0 Find the correct expression for the output voltage vo t in V for t 0 a t b 2t2 c t 3 d 4 e 5t2 3 Problem 15 The inductor voltage vL for t 0 is as shown below the part for t 0 is not shown It is also known that iL 0A the initial condition iL 0 is a 1 A b 1 A c 2 A d 2 A e 0 A Problem 16 For the circuit shown you are given that VC 0 10V and that the resistors in the circuit dissipate a total energy of 1J in the time interval 0 t The value of C is a 0 01 F b 0 02 F c 0 05 F d 0 2 F e 0 5 F Problem 17 The circuit shown has been up and running for a very long time What is iR a 0 A b 1 6 A c 1 6 A d 2 4 A e 2 4 A Problem 18 The amount of charge stored on the capacitor at t 1 sec is a 0 C b 0 37 C c 0 74 C d 1 82 C e 2 C Problem 19 The current in a 50 mH inductor is shown below Find and plot the inductor voltage e VL 0 for all t Problem 20 Vin t below is applied to the inductor in the circuit below The inductor current at time t 0 is 0 A What is the energy stored in the inductor at time t 1 s a WL t 1 s 0 J b WL t 1 s 1 8 J d WL t 1 s 180 J e WL t 1 s 720 J c WL t 1 s 7 2 J Workout Problem 20 points The switch in the circuit below has been closed for a long time before it is opened at time t 0 Solve the four problems below Make sure that you put your answers in the boxes provided for each problem Show all steps of your work so partial credit can be assigned a Find iL t 0 iL t 0 b Find iL t 0 iL t 0 c Find the time constant for e t time dependence for t 0 d Find an expression for iL t for t 0 iL t
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