Gyikoo/KT_QA huggingface dataset:
问题：As the circuit shown in the figure, the input voltageui=0.2sin314tV, resistanceR1=R2=R3=R4=Ro=RL=10kΩ. The load currentiL=[填空1]mA, whent=0.01s.t=0.01s
答案：{"1": ["0"]}
问题：What are the fundamental components for computers? {'A': 'combinatorial logic', 'B': 'clock signal', 'C': 'monitor', 'D': 'ADC', 'E': 'sequential logic', 'F': 'DAC', 'G': 'memory', 'H': 'CPU', 'I': 'hard disk', 'J': 'keyboard', 'K': 'mouse'}
答案：A, B, D, E, F
问题：For the logic expression $Y = Abar BC$, what is the value of Y when A=C=1 and B=0? {'A': '1', 'B': '0'}
答案：A
问题：For the true value table, what is the corresponding logic expression? {'A': '$AB + Abar B$', 'B': '$AB + bar AB$', 'C': '$AB + AB$', 'D': '$AB + bar Abar B$'}
答案：D
问题：Is there current flowing through gate terminal of MOSFET? {'A': 'Yes.', 'B': 'No.', 'C': 'Determined by specific circuit.'}
答案：B
问题：When MOSFET operates in resistive region, does ${u_{GS}}$ has impact on the equivalent resistance between drain and source terminals? {'A': 'Yes.', 'B': 'No.'}
答案：A
问题：In digital electronic circuit, when MOSFET is turned on, which region does it worked in? {'A': 'resistive region', 'B': 'saturation region'}
答案：A
问题：What is the correct logic expression for the following circuit? {'A': '$Y = {X_1}{X_2} + {X_3}({X_4} + {X_5})$', 'B': '$Y = overline {{X_1}{X_2} + {X_3}({X_4} + {X_5}){X_6}}$', 'C': '$Y = {X_1}{X_2}{X_3}({X_4} + {X_5}){X_6}$', 'D': '$Y = overline {{X_1}{X_2}}  + overline {{X_3}({X_4} + {X_5}){X_6}}$'}
答案：B
问题：Which condition is not necessary to ensure logic gates consisted by MOSFET work as expected? {'A': 'RL>>Ron', 'B': 'Us=5V', 'C': 'proper frequency of input'}
答案：B
问题：Can the positions of enhanced P-MOSFET and N-MOSFET in CMOS interchange by each other? {'A': 'Yes.', 'B': 'No.'}
答案：B
问题：In the last slide of Lecture 27, if there are other branches connected between network N1 and N2, is the three-terminal network still be two-port network? {'A': 'Yes.', 'B': 'No.'}
答案：A
问题：What property does reciprocal two-port network have? {'A': '${G_{11}} = {G_{12}}$', 'B': '${G_{12}} = {G_{21}}$', 'C': '${G_{12}} = -{G_{21}}$'}
答案：B
问题：G parameters of the following circuit is: {'A': '$G = left[ {begin{array}{*{20}{c}}{0.25}~~0{ - 0.25}~~{0.5}end{array}} right]{rm{S}}$', 'B': '$G = left[ {begin{array}{*{20}{c}}{0.25}~{  0.25}0~~{0.5}end{array}} right]{rm{S}}$', 'C': '$G = left[ {begin{array}{*{20}{c}}{0.25}~~~{0}{0.25}~~{0.5}end{array}} right]{rm{S}}$'}
答案：A
问题：Transmission parameters of the following circuit is: {'A': '$T = left[ {begin{array}{*{20}{c}}{0.75}~~{ - 0.5Omega }{ - 0.75{rm{S}}}~~{ - 1.5}end{array}} right]$', 'B': '$T = left[ {begin{array}{*{20}{c}}{0.75}~~{0.5Omega }{ - 0.75{rm{S}}}~~{1.5}end{array}} right]$', 'C': '$T = left[ {begin{array}{*{20}{c}}{0.75}~~{0.5Omega }{0.75{rm{S}}}~~{1.5}end{array}} right]$'}
答案：B
问题：R parameters of the following circuit is: {'A': '$R = left[ {begin{array}{*{20}{c}}4~~20~~2end{array}} right]Omega$', 'B': '$R = left[ {begin{array}{*{20}{c}}4~~02~~2end{array}} right]Omega$', 'C': '$R = left[ {begin{array}{*{20}{c}}{0.5}~~0{0.25}~~{0.25}end{array}} right]Omega $'}
答案：B
问题：Which is not necessary to be satisfied for the reciprocal two-port network? {'A': '${G_{12}}{rm{ = }}{G_{21}}$', 'B': '${R_{12}}{rm{ = }}{R_{21}}$', 'C': '${T_{12}}{rm{ = }}{T_{21}}$', 'D': '${H_{12}}{rm{ = }}-{H_{21}}$'}
答案：C
问题：Which is a symmetrical two-port network? {'A': '${G_{12}}{rm{ = }}{G_{21}}$ or ${G_{11}}{rm{ = }}{G_{22}}$', 'B': '${R_{12}}{rm{ = }}{R_{21}}$ and ${R_{11}}{rm{ = }}{R_{22}}$', 'C': '${T_{11}}{T_{22}} - {T_{12}}{T_{21}} = 1$', 'D': '${H_{11}}{H_{22}} - {H_{12}}{H_{21}} = 1$'}
答案：B
问题：Does any two-port network can be equalized by a $T$ or $Pi$ network consisted by three resistors? {'A': 'Yes.', 'B': 'No.'}
答案：B
问题：How many controlled sources are required at least in an equivalent circuit of an unreciprocal two-port network? {'A': 'zero.', 'B': 'one.', 'C': 'two.'}
答案：B
问题：T parameters of the following circuit is: {'A': '$T = frac{1}{9}left[ {begin{array}{*{20}{c}}{10}~~{36Omega }{1{rm{S}}}~~9end{array}} right]$', 'B': '$T = frac{1}{9}left[ {begin{array}{*{20}{c}}{31}~~{48Omega }{8{rm{S}}}~~15end{array}} right]$', 'C': '$T = frac{1}{9}left[ {begin{array}{*{20}{c}}{-5}~~{24Omega }{-4{rm{S}}}~~3end{array}} right]$'}
答案：B
问题：G parameters of the following circuit is: {'A': '$G = frac{1}{{16}}left[ {begin{array}{*{20}{c}}8~~{ - 5}{ - 5}~~9end{array}} right]{rm{S}}$', 'B': '$G = frac{1}{{256}}left[ {begin{array}{*{20}{c}}{21}~~{ - 22}{ - 19}~~{26}end{array}} right]{rm{S}}$', 'C': '$G = frac{1}{{16}}left[ {begin{array}{*{20}{c}}{15}~~66~~{20}end{array}} right]{rm{S}}$'}
答案：A
问题：In the following circuit，${G_{rm{1}}} = left[ {begin{array}{*{20}{c}} {0.5}~~{ 0.5} {0.4}~~{0.8} end{array}} right]{rm{S}}$，G parameters of the two-port network in the dashed box is: {'A': '$G = left[ {begin{array}{*{20}{c}}{7.5}~~{1.7}{2.4}~~{2.8}end{array}} right]{rm{S}}$', 'B': '$G = left[ {begin{array}{*{20}{c}}{0.091}~~{ 0.007}{0}~~{0.154}end{array}} right]{rm{S}}$', 'C': '$G = left[ {begin{array}{*{20}{c}}{0.1}~~{ - 0.06}{ - 0.08}~~{0.56}end{array}} right]{rm{S}}$'}
答案：B
问题：Which of the following is correct? {'A': 'Parallel connection of two two-port networks will not destroy port conditions.', 'B': 'Series connection of two two-port networks will destroy port conditions.', 'C': 'Parallel connection of two three-terminal networks will not destroy port conditions.', 'D': 'Cascade connection of two two-port networks will not destroy port conditions.'}
答案：D
问题：The circuit can realize logic function $y = (A + B)CD$ is shown in Figure____ {'A': 'a', 'B': 'b'}
答案：B
问题：The following figure shows two circuits formed by NMOS.The circuit can realize logic function $y = overline {AB + C + D}$ is shown in Figure____ {'A': 'a', 'B': 'b'}
答案：A
问题：Solve the power absorbed by the circuits formed by NMOS in figure (a) two inputs NAND gate and figure (b) two inputs NOR gate, when both two inputs are logic “1”. The given conditions are voltage sourceUS=5V, MOSFET’s on resistanceRon=270Ωand load resistanceRL=100kΩ.For Figure (a),P=[填空1]mW:For Figure (b),P=[填空2]mW:
答案：{"1": ["0.249"], "2": ["0.25"]}
问题：With regard to a circuit with n nodes and b branches, (1) how many KCL equations are required when branch current method is applied? {'A': 'b', 'B': 'n', 'C': 'b-n+1', 'D': 'n-1'}
答案：D
问题：With regard to a circuit with n nodes and b branches, (2) How many KVL equations are required? {'A': 'b', 'B': 'n', 'C': 'b-n+1', 'D': 'n-1'}
答案：C
问题：Write down the equations of the following circuit by Node Voltage Analysis in its standard form $ A{U_{rm{n}}} = B $, where $ {U_{rm{n}}} = {left[ {begin{array}{*{20}{c}} {{U_{{rm{n1}}}}}~~{{U_{{rm{n2}}}}}~~{{U_{{rm{n3}}}}} end{array}} right]^T} $ . What is $ A $ and $ B $?(Note: Rows of A and B can be exchanged simultaneously.) {'A': '$A = left[ {begin{array}{*{20}{c}}3~~1~~{ - 3.5}{ - 0.5}~~{ - 1}~~2{ - 1}~~1~~0end{array}} right],quad B = left[ {begin{array}{*{20}{c}}055end{array}} right]$', 'B': '$A = left[ {begin{array}{*{20}{c}}1~~0~~{ - 0.5}0~~1~~{ - 1}{ - 0.5}~~{ - 1}~~1end{array}} right],quad B = left[ {begin{array}{*{20}{c}}025end{array}} right]$', 'C': '$A = left[ {begin{array}{*{20}{c}}1~~1~~{ - 1.5}{ - 0.5}~~{ - 1}~~2{ - 1}~~1~~0end{array}} right],quad B = left[ {begin{array}{*{20}{c}}{ - 2}55end{array}} right]$'}
答案：A
问题：Which type equations are listed when node voltage analysis is applied? {'A': 'KCL.', 'B': 'KVL.', 'C': 'element characteristics.'}
答案：A
问题：What is the self-conductance of node ① in the following circuit? {'A': '1', 'B': '2', 'C': '3'}
答案：B
问题：What is the self-conductance of node 1 in the following circuit? {'A': '1S', 'B': '2S', 'C': '1.5S'}
答案：A
问题：And what is the current source flowing into node 3? {'A': '0', 'B': '5A', 'C': '-5A'}
答案：B
问题：Which type equations are wanted when loop current analysis is applied? {'A': 'KCL.', 'B': 'KVL.', 'C': 'elements characteristics.'}
答案：B
问题：The circuit is shown as following. A set of independent loops is selected as shown in the circuit, and corresponding loop currents are ${I_1},{I_2},{I_3}$ and ${I_4}$ respectively. What is the mutual resistance between loop ② and loop ③ when loop current analysis is applied? {'A': '0', 'B': '5V', 'C': '2Ohm'}
答案：A
问题：The circuit is shown as following. A set of independent loops is selected as shown in the circuit, and corresponding loop currents are ${I_1},{I_2},{I_3}$ and ${I_4}$ respectively. Which is the correct equation of loop ① in the following circuit when loop current analysis is applied? {'A': '$3{I_1} - 2{I_3} = 2$', 'B': '$3{I_1} - 2{I_3} = 0$', 'C': '${I_1} =  - 2{rm{A}}$'}
答案：C
问题：Write down the equations of the following circuit by Loop Current Analysis in its standard form $ A{I_{rm{l}}} = B $, where $ {I_{rm{l}}} = {left[ {begin{array}{*{20}{c}} {{I_{{rm{l1}}}}}~~{{I_{{rm{l2}}}}}~~{{I_{{rm{l3}}}}} end{array}} right]^T} $ . What is A and B?(Note: Rows of A and B can be exchanged simultaneously.) {'A': '$A = left[ {begin{array}{*{20}{c}}3~~0~~{ - 1}0~~2~~34~~{ - 1}~~1end{array}} right],;;B = left[ {begin{array}{*{20}{c}}550end{array}} right]$', 'B': '$A = left[ {begin{array}{*{20}{c}}3~~0~~{ - 1}-1~~2~~34~~{ - 1}~~1end{array}} right],;;B = left[ {begin{array}{*{20}{c}}{ - 5}{ - 5}0end{array}} right]$', 'C': '$A = left[ {begin{array}{*{20}{c}}3~~0~~{ - 1}0~~2~~0{ - 1}~~0~~3end{array}} right],;;B = left[ {begin{array}{*{20}{c}}{ - 5}5{ - 10}end{array}} right]$'}
答案：B
问题：For the three-input-one-output linear system, which of the following expressions are correct? {'A': '$y = 5{x_1} + 6{x_2} - 10{x_3}$', 'B': '$y = 6{x_2}$', 'C': '$y = 5{x_1}{x_3} + 4{x_2}{x_3} + 10{x_1}{x_2}$', 'D': '$y = 4{({x_1})^2}$'}
答案：A, B
问题：The no-effect independent current source means? {'A': 'short circuit', 'B': 'open circuit', 'C': 'infinite current', 'D': 'infinite voltage'}
答案：B
问题：Which of the following variables can be found directly by superposition theorem? {'A': 'branch voltage', 'B': 'branch power', 'C': 'branch current', 'D': 'branch energy'}
答案：A, C
问题：The value of the node voltage U1 at the end of the previous video is[填空1]V.
答案：{"1": ["13.6"]}
问题：What are the corresponding circuits of the general lines in u-i plane? {'A': 'a resistor', 'B': 'an independent voltage source connecting in series with a resistor', 'C': 'an independent voltage source', 'D': 'an independent current source connecting in series with a resistor', 'E': 'an independent current source connecting in parallel with a resistor'}
答案：B, E
问题：What is the corresponding circuit if we add an independent voltage source u and find the port current i? {'A': 'a resistor', 'B': 'an independent voltage source connecting in series with a resistor', 'C': 'an independent voltage source', 'D': 'an independent current source connecting in series with a resistor', 'E': 'an independent current source connecting in parallel with a resistor'}
答案：E
问题：The current I in the circuit is[填空1]A.
答案：{"1": ["0.2"]}
问题：For the voltage signal process circuits, among these four parameters, which is the best one? {'A': 'Ri=10 Ohm', 'B': 'Ri=100 Ohm', 'C': 'Ri=1kOhm', 'D': 'Ri=10kOhm'}
答案：D
问题：For the current signal process circuits, among these four parameters, which is the best one? {'A': 'Gi=10 Siemens', 'B': 'Gi=100 Siemens', 'C': 'Gi=1k Siemens', 'D': 'Gi=10k Siemens'}
答案：D
问题：Which of the following element can substitute the 1V voltage source in the figure? {'A': 'R=1 Ohm resistor', 'B': 'Ri=10 Ohm resistor', 'C': 'I=1A current source', 'D': 'U= -1V voltage source'}
答案：A
问题：For the diode with u-i relationship $i = {I_S}({e^{u/{U_{TH}}}} - 1)$, which of the following statement is correct? {'A': 'It can only be regarded as a voltage-controlled nonlinear resistor.', 'B': 'It can only be regarded as a current-controlled nonlinear resistor.', 'C': 'It can both be regarded as a voltage-controlled nonlinear resistor and a current-controlled nonlinear resistor.', 'D': 'It is not a resistor.'}
答案：C
问题：For the circuit containing nonlinear resistor withu=f(i)=50i+0.5i2, the excitation current source isi=sint, the new frequency generated by the circuit is ω=[填空1]rad/s.
答案：{"1": ["2"]}
问题：For the circuit, what are the possible solutions for voltage u? {'A': '0', 'B': '0.5V', 'C': '1V', 'D': '1.5V', 'E': '2V', 'F': '2.5V'}
答案：C, D
问题：How many sub-circuits do we need to analyze for finding the solution of the previous circuit? {'A': '1', 'B': '2', 'C': '3', 'D': '4', 'E': '5'}
答案：D
问题：For the circuit, using ideal diode model, what is the voltage u when t=1.5π? {'A': '0', 'B': '5V', 'C': '10V', 'D': '-5V', 'E': '-10V'}
答案：A
问题：In previous simulation and on-site experiment, where is the voltage difference between the source voltage and the load voltage? {'A': 'on the line.', 'B': 'in the air.', 'C': 'on the diode.'}
答案：C
问题：Finish the exercise in the previous slide and find the voltage u. {'A': '0', 'B': '1V', 'C': '2V', 'D': '3V', 'E': '4V'}
答案：D
问题：The parameters for the MOSFET are $K = 0.5{rm{mA}}/{V^2}$，${U_T} = 1{rm{V}}$，${R_{ON}} = 1{rm{k}}Omega$, the MOSFET is working in which region? {'A': 'cut-off.', 'B': 'voltage-controlled current source.', 'C': 'resistor.'}
答案：B
问题：How many possible current direction(s) exist for the load resistor in the full-bridge rectifying circuit? {'A': '0.', 'B': '1.', 'C': '2.', 'D': '4.', 'E': '16.'}
答案：B
问题：The parameters for the MOSFET areK=0.5mA/V2，UT=1V，RON=1kΩ, find the voltageUDS=[填空1]V.
答案：{"1": ["5.69"]}
问题：Which of the following facts might be the reasons for the malfunction of the conceptual amplifier? {'A': 'The diode is not good enough.', 'B': 'We cannot put all the amplified signal into the on-state of the diode.', 'C': 'The current-controlled-current-source is expensive', 'D': 'The diode is with exponential u-i relationship.'}
答案：B, D
问题：In the previous slide, we used two circuits containing one source respectively and found the total solution for the branch variable by adding the results of the two circuits. Is this an application of the Superposition Theorem? {'A': 'Yes.', 'B': 'No.'}
答案：B
问题：For the nonlinear resistoru=i2, we know its Q-point is (1V, 1A). Its quiescent resistanceRQ=[填空1]Ωand dynamic resistanceRD=[填空2]Ω.
答案：{"1": ["1"], "2": ["2"]}
问题：As the circuit shown in Fig.(a), the voltage source is ${u_S}(t) = sin;V$(figure(b)), the ideal model is used for the diode. The waveform of the voltage ud across the diode solved by piecewise-linear method is: (a) as shown figure (c); (b) as shown figure (d). {'A': 'Fig.(c)', 'B': 'Fig.(d)'}
答案：B
问题：As the circuit shown in figure (a), the volt-ampere characteristics of the nonlinear resistors are shown in figure (b), the current source iS =1A, then the voltage across the current source u=[填空1]V.
答案：{"1": ["2"]}
问题：The relationship between the voltage and the current of the nonlinear resistor isu=2i+i3. Wheni=1A, find the static resistanceRs=[填空1]Ωand dynamic resistanceRd=[填空2]Ω; Wheni=2A, find the static resistanceRs=[填空3]Ωand dynamic resistanceRd=[填空4]Ω.
答案：{"1": ["3"], "3": ["6"], "2": ["5"], "4": ["14"]}
问题：As the circuit shown in the following figure, the current of the diode I =[填空1]mA.
答案：{"1": ["0.52"]}
问题：The current of DC current source isIS=2A, the voltage of DC voltage source isUS=6V,R1=1Ω,R2=6Ω, the volt-ampere characteristics of the nonlinear resistor isU3=I33.Then the voltageUR1=[填空1]V.
答案：{"1": ["1"]}
问题：As the circuit shown in the following figure, the volt-ampere characteristics of the nonlinear resistor isu=i+23i3,US=10V,R=1Ω, whenuS(t)=0,i=2A. Find the currenti=2+[填空1]sin1000tAwhenuS(t)=0.1sin1000tVby using small signal analysis.
答案：{"1": ["0.01"]}
问题：As the circuit shown in the following figure, the volt-ampere characteristics of the two nonlinear resistors areThe current source IS = 8A, iS(t) = 0.2cos1000t A(can be seen as small signal). Findu=[填空1]+[填空2]cos1000t Vi1=[填空3]+[填空4]cos1000t Ai2=[填空5]+[填空6]cos1000t A in the circuit.
答案：{"1": ["2"], "3": ["4"], "2": ["0.0286"], "5": ["4"], "4": ["0.114"], "6": ["0.0857"]}
问题：Multiple selection problem(single option)Which of the following option is the dual counterpart of the capacitor C? {'A': 'The resistor R.', 'B': 'The conductor', 'C': 'The capacitor', 'D': 'The inductor L.', 'E': 'The voltage source ${U_{rm{S}}}$.', 'F': 'The current source ${I_{rm{S}}}$.'}
答案：D
问题：Fill in the blankFor the capacitor, its initial voltage isu(0)=1V. The currentiis illustrated in the figure. Its voltagev(2s)=[填空1]V.
答案：{"1": ["2"]}
问题：Fill in the blankFor the steady state circuit, the voltageU1=[填空1]V.
答案：{"1": ["2"]}
问题：Fill in the blankFor the sub-circuit, the equivalent inductanceLeq=[填空1]mH.
答案：{"1": ["2"]}
问题：Multiple selection problem(single option)Which of the following option is ${u_C}left( infty right)$ in the previous slide? {'A': '${U_{rm{2}}}$.', 'B': '100V.'}
答案：B
问题：Fill in the blankFor a first-order circuit, we know that the steady state currenti=sin(10t+30∘)Aand the0+value of the same currenti(0+)=1A. In the three-element expressionthe value of the coefficient A=[填空1]
答案：{"1": ["0.5"]}
问题：Fill in the blankFor the circuit, the0+value of the voltageuR(0+)=[填空1]V, the steady value of the voltageuR(∞)=[填空2]V, and the time constantτ=[填空3]s.
答案：{"1": ["2"], "3": ["3"], "2": ["0.5"]}
问题：As the circuit shown in the following figure, ${u_C}({0^ - }) = {rm{1V}}$, S is switched on at t=0. When ${rm{Us}} = {rm{2V}}$, the zero state response of ${u_C}$ is ${u_{CZSR}}(t) = 1.5 - 1.5{{rm{e}}^{ - t}}{rm{V}}$, the zero input response is ${u_{CZIR}}(t) = {{rm{e}}^{ - t}}{rm{V}}$ and the full response is ${u_{CFR}}(t) = 1.5 - 0.5{{rm{e}}^{ - t}}{rm{V}}$. When ${rm{Us}} = {rm{10V}}$, the capacitor voltage at t=1s after switching ${u_C}left( {rm{1}} right)$ is _____: {'A': '6.58V', 'B': '4.74V', 'C': '5.11V', 'D': '6.55V.'}
答案：C
问题：The voltage waveform of capacitor is shown in the following figure. The capacitance isC=50μF, and voltage and current are in associated direction. Solve the value of current i(t) through capacitor when (1) t = 0.5s,i(t)=[填空1]μA; (2) t = 1.5s,i(t)=[填空2]μA; (3) t = 3.1s,i(t)=[填空3]μA.
答案：{"1": ["50"], "3": ["-250"], "2": ["0"]}
问题：As the circuit shown in Fig. (a), R=1ohm, L=1H, C=1F. The voltage waveform of voltage source is shown in Fig. (b), andiL(0)=0. Solve (1) when t = 3s, the storage energy in the inductor is [填空1]J; (2) when t = 3s, the storage energy in the capacitor is [填空2]J
答案：{"1": ["312.5"], "2": ["50"]}
问题：The circuit shown in the following figure is switched at t=0 (the circuit is in steady condition before switching). Solve: (1) the initial value of currenti1isi1(0+)=[填空1]mA; (2) the initial value of currentiCisiC(0+)=[填空2]mA.
答案：{"1": ["-33.1"], "2": ["-16.9"]}
问题：The circuit shown in the following figure is switched at t=0 (the circuit is in steady condition before switching). Solve: (1) The initial value of inductor currentiL(0+)=[填空1]A; (2)The initial value of first order of derivative of inductor currentdiLdt|0+=[填空2]A/s; (3) The initial value of capacitor voltageuC(0+)=[填空3]V; (4) The initial value of first order of derivative of capacitor voltageduCdt|0+=[填空4]V/s.
答案：{"1": ["1"], "3": ["80"], "2": ["0"], "4": ["-10000"]}
问题：As the circuit shown in the following figure, the capacitor voltage at t=0.2s is 8V after S is switched off. Solve the capacitanceC=[填空1]μF.
答案：{"1": ["12.4"]}
问题：As the circuit shown in the following figure, the initial energy stored in capacitor is zero and the controlled voltage source is current-controlled voltage source. S is switched from a to b at t=0. Solve: (1)When t＝4.5s, the capacitor voltageuC=[填空1]V; (2) When t＝4.5s, the currenti1=[填空2]mA.
答案：{"1": ["47.4"], "2": ["43.9"]}
问题：As the circuit shown in the following figure, S is switched on at t=0.（1）Choice: The response capacitor voltageuCand currenti1is (a) zero input response; (b) zero state response. Your choice is[填空1].（2）The capacitor voltageuCis[填空2]V att=3×10−3s.
答案：{"1": ["1.32"], "2": ["-0.442"]}
问题：As the circuit shown in the following figure, S is switched on at t=0.The resistor currenti1is _____mA att=3×10−3s. {'A': 'zero input response', 'B': 'zero state response'}
答案：A
问题：As the circuit shown in the following figure, S is switched on at t=0. Find the value of capacitor currentiCat t=0.2s in the following conditions: (1) zero state responseiCZSR(0.2)is[填空1]mA; (2) zero input responseiCZIR(0.2)is[填空2]mA; (3) full responseiCFR(0.2)is[填空3]mA.
答案：{"1": ["4.42"], "3": ["-0.552"], "2": ["-4.97"]}
问题：As the circuit shown in the following figure,S1is switched on at t=0 andS2is switched on at t=1s. Find: (1) The change of capacitor current at the moment of the second switching (i.e.iC(1+)－iC(1−)) is [填空1]A; (2) At t=1.5s, the capacitor voltageuC(1.5)is [填空2]V; (3) At t=1.5s, the capacitor currentiC(1.5)is [填空3]A.
答案：{"1": ["0.117"], "3": ["0.178"], "2": ["4.14"]}
问题：Multiple selection problem (single option)For the circuit, if the input signal ${u_{rm{i}}}$ is a triangle wave, what is the output signal ${u_{rm{o}}}$? {'A': 'Rectangle wave.', 'B': 'Line.', 'C': 'Sine wave.', 'D': 'Triangle wave with same phase.', 'E': 'Triangle wave with opposite phase.'}
答案：A
问题：Multiple selection problem (single option)In the circuit, the Op Amp’s saturated voltage is $pm {rm{2}}0{rm{V}}$, what is the output signal ${u_{rm{o}}}$ when the input signal ${u_{rm{i}}}$ is 2V? {'A': '+20V.', 'B': '-20V.', 'C': '0.'}
答案：B
问题：Multiple selection problem (single option)Which of the following characteristics is correct while analyzing the positive feedback Op Amp circuit? {'A': 'Virtual-short.', 'B': 'Virtual-open.'}
答案：B
问题：Fill in the blankFor the hysteresis comparator, its hysteresis width=[填空1]Usat.
答案：{"1": ["0.667"]}
问题：Fill in the blankFor the pulse generator, the output pulse&#39;s periodT=[填空1]msand its duty cycleD=[填空2]%.
答案：{"1": ["2.2"], "2": ["50"]}
问题：Multiple selection problem(one option)For the equivalent circuit (a) and (b), the ${u_{rm{S}}}$ in (b) is {'A': '${U_{rm{S}}}$', 'B': '${U_{rm{S}}}varepsilon left( t right)$', 'C': '${U_{rm{S}}} + varepsilon left( t right)$'}
答案：B
问题：Multiple selection problem(one option)Is there any difference between $i = {{rm{e}}^{ - t}};;t &gt; {0^ + }$ and $i={{rm{e}}^{ - t}}varepsilon left( t right)$ ? {'A': 'Yes.', 'B': 'No.'}
答案：A
问题：Fill in the blankFor the expressionf(t)=tε(t)+2ε(t−2)−tε(t−2),f(3)=[填空1].
答案：{"1": ["2"]}
问题：Multiple selection problem(one option)For the circuit, which of the following characteristics is correct? {'A': 'over-damping.', 'B': 'critical-damping.', 'C': 'under-damping.', 'D': 'no-damping'}
答案：C
问题：Fill in the blanksFor the circuit below,uC(5s)=[填空1]V.
答案：{"1": ["1000"]}
问题：Fill in the blanksFor the zero state circuit below,iR(1s)=[填空1]A.
答案：{"1": ["0.368"]}
问题：Multiple selection problem(one option)Can we use convolution integral to calculate the full response? {'A': '(a) Yes.', 'B': '(b) No.'}
答案：B
问题：Multiple selection problem(one option)For the convolution integral of the following two functions, how many time segments are required when $t{rm{ &gt; 0}}$? {'A': '1', 'B': '2', 'C': '3', 'D': '4'}
答案：C
问题：Multiple selection problem(one option)The height of the pulse wave in the figure is {'A': '$eleft( 0 right)$', 'B': '$eleft( {Delta tau } right)$', 'C': '$eleft( {2Delta tau } right)$', 'D': '$eleft( {kDelta tau } right)$'}
答案：B
问题：Fill in the blanksFor the circuit below,R=1000kΩ,C=1μF,uC(0−)=3V,is=e−2tε(t)μA,,iZSRR(1s)=[填空1]μA,iFRR(1s)=[填空2]μA.
答案：{"1": ["0.233"], "2": ["1.336"]}
问题：Fill in the blankFor the convolution integralr(t)=f1(t)∗f2(t), wheref1(t)andf2(t)have the following waves,r(1s)=[填空1]
答案：{"1": ["0.632"]}
问题：The circuit shown in the following figure is in steady state. S is switched on at t=0.Choice: the correct expression of the current $ileft( t right)$ is _____. {'A': '$i(t) = - 0.667 - 0.333{{rm{e}}^{ - 0.3t}}{rm{A}}quad t ge {0^ + }$', 'B': '$i(t) = - 0.667 - 0.5{{rm{e}}^{ - 2.5t}}{rm{A}}quad t ge {0^ + }$', 'C': '$i(t) = - 0.667 - 0.333{{rm{e}}^{ - 0.3t}} + 0.5{{rm{e}}^{ - 2.5t}}{rm{A}}quad t ge {0^ + }$', 'D': '$i(t) = 1.33 - 0.333{{rm{e}}^{ - 0.3t}} - 0.5{{rm{e}}^{ - 2.5t}}{rm{A}}quad t ge {0^ + }$'}
答案：C
问题：As the circuit shown in the following figure, the output voltage at t = 0.01s is [填空1]V.
答案：{"1": ["-6.32"]}