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h3inkr
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eee_v2

id int64 7 87	problem stringlengths 208 694	solution stringlengths 1 4
7	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: The voltage of the three electrodes of a silicon transistor measured with a multimeter is shown in the figure. It can be determined that the transistor is operating in ( ) Choices A. Amplification state B. Cu...	A
16	Hint: Please answer the question requiring an integer answer and provide the final value, e.g., 1, 2, 3, at the end. Question: In the circuit shown below, the switch is closed at \( t = 0 \). The value of \( \theta \) in degrees which will give the maximum value of DC offset of the current at the time of switching is _...	-45
17	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: In the voltage comparator circuit shown in figure, the stable voltage of the Zener diode VD\(_{Z}\) is \( U_{Z} = 6V \), with a forward conduction voltage \( ...	-2
19	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: Calculate the (unregulated) voltage across the 1000 μF capacitor under no-load conditions in the regulated power supply circuit, as shown in the figure. The...	32.5
21	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: In the circuit shown in figure, to make the current \( I = 2A \), the value of the resistor \( R \) should be _______ Ω.	4
22	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown, the Norton equivalent resistance (in \( \Omega \)) across terminals a-b is ______. Choices: A. 1.3 B. 0.8 C. 1.9 D. 2.2	A
25	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: Assume that the \(\beta\) of the transistor is extremely large and \(V_{BE}=0.7 \mathrm{~V}\). \(I_C\) and \(V_{CE}\) in the circuit shown in <image> are Choices A. \(I_C=1 \text{ mA}, V_{CE}=4.7 \text{ V}...	C
26	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in figure, the static tube voltage drop \( U_{CE} \) is 7V, then the quiescent current \( I_E \) is ( ). Choices A. 5mA B. 10mA C. 12mA D. 24mA	A
30	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the single-phase rectifier consisting of three thyristors \(T_1\), \(T_2\), \(T_3\) and a diode \(D_1\) shown in <image>, the circuit feeds power to a \(10 \, \text{A}\) constant current load. \(T_1\) and ...	C
31	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: Replacing the circuit shown in figure (a) with the equivalent current source shown in figure, the parameters of the current source are \( I_S = \) ________ A....	1.5
33	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: In the transistor amplifier circuit shown in <image>, the transistor has the following parameters: \( \beta_{DC} = 60 \), \( V_{BE} = 0.7V \), \( h_{ie} \righ...	6
35	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in figure, the current value \( I \) is: Choices A. -6A B. -2A C. 2A D. 6A	C
37	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: The switch has been in position 1 for a long time and abruptly changes to position 2 at \( t = 0 \). If time \( t \) is in seconds, the capacitor voltage \( V_C \) (in volts) for \( t > 0 \) is given by *...	D
40	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: For the Op-Amp circuit shown in <image>, \( V_0 \) is ( V\)	-0.5
41	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the figure shown, an integrated operational amplifier circuit uses a ±12 V dual power supply. When the input voltages are \( u_{i1} = 10 \sin \omega t \, \mathrm{mV} \) and \( u_{i2} = 20 \sin \omega t \, ...	D
42	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in figure, the potential at point \( a \) is Choices A. 0 B. 5V C. -5V D. 11V	C
43	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: The figure shows the circuit of a rectifier fed from a 230 V (rms), 50-Hz sinusoidal voltage source. If we want to replace the current source with a resistor ...	23
45	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: For the circuit shown in the figure, the initial conditions are zero. Its transfer function \( H(s) = \frac{V_c(s)}{V_i(s)} \) is Choices: A. \( \frac{1}{s^2 + 10^6 s + 10^6} \) B. \( \frac{10^6}{...	D
50	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: The following series RLC circuit with zero initial conditions is excited by a unit impulse function \( \delta(t) \). For \( t > 0 \), the voltage across the resistor is Choices: A. \( \frac{1}{\sqrt...	B
51	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: For the voltage regulator circuit shown in <image>, the input voltage \(\left(V_{\text{in}}\right)\) is \(20 \text{ V} \pm 20\%\) and the regulated output vol...	2.8
54	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in <image>, assume that the voltage drop across a forward-biased diode is 0.7 V. The thermal voltage \( V_t = \frac{KT}{q} = 25 \text{mV} \). The small signal input is \( v_i = V_P \cos(\...	A
63	Hint: Please answer the question requiring a floating-point number with two decimal place and provide the final value, e.g., 1.23, 1.34, 1.45, at the end. Question: Given image denotes a common-collector amplifier circuit. Calculate the approximate voltage gain (A\(_V\)) for the common-emitter amplifier circuit, as sh...	7.02
70	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in <image> using an ideal opamp, the 3-dB cut-off frequency (in Hz) is Choices A. 100.10 B. 120.25 C. 159.15 D. 200.45	C
73	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: To maximize power transfer, a lossless transmission line is to be matched to a resistive load impedance via a \(\lambda/4\) transformer as shown. The characteristic impedance (in \(\Omega\)) of the \(\lambd...	C
75	Hint: Please answer the question requiring a floating-point number with one decimal place and provide the final value, e.g., 1.2, 1.3, 1.4, at the end. Question: In the sinusoidal AC circuit shown in figure, an inductance with reactance of \( 10 \Omega \) and a load \( Z \) are connected in series. If the voltmeter (V1...	10
79	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown below, the Norton equivalent current in amperes with respect to the terminals P and Q is Choices: A. \( 6.4 - j \, 4.8 \) B. \( 6.56 - j \, 7.87 \) C. \( 10 + j \, 0 \) D....	A
82	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the circuit shown in figure, the voltage \( U \) is ( ). Choices A. -50V B. -10V C. 10V D. 50V	C
84	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: In the difference amplifier shown in <image>, assume the op-amp to be ideal. The CMRR (in dB) of the difference amplifier is ______ (rounded off to 2 decimal places). Choices A. 12.36 B. 36.25 C. 40.52 D. 48...	C
86	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: Consider the R-L-C circuit shown in the <image>. For a step-input \( e_i \), the overshoot in the output \( e_o \) will be ______. Choices: A. 0, since the system is not underdamped B. 5% C. 16% D. ...	C
87	Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end. Question: For the BJT in the amplifier shown in <image>, \( V_{BE} = 0.7V \), \( kT/q = 26mV \). Assume the BJT output resistance (\( r_o \)) is very high and the base current is negligible. The capacitors are also ass...	A

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