超星Concise Circuits章节答案(学习通2023完整答案)

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1 Fundamentals of Circuits

Test 1 : Fundamentals of Circuits

1、超星The节答 branch current is equal to
A、2A
B、案学4A
C、习通6A
D、完整8A

2、答案The超星 branch current is equal to
A、1A
B、节答2A
C、案学3A
D、习通4A

3、完整The答案 branch voltage is equal to
A、1V
B、超星2V
C、节答3V
D、案学7V

4、The branch voltage is equal to
A、1V
B、3V
C、5V
D、7V

5、The branch current is equal to
A、1A
B、1.5A
C、3A
D、3.5A

6、The branch current is equal to
A、0.5A
B、2A
C、2.5A
D、4.5A

7、The power of is equal to
A、4W
B、8W
C、18W
D、36W

8、The power of is equal to
A、3W
B、6W
C、12W
D、24W

9、The power of is equal to
A、
B、
C、
D、

10、Circuit models are real circuit elements.

2 Dynamic Circuits

Test 2: Dynamic Circuits

1、The relation between is
A、
B、
C、
D、

2、The relation between is
A、
B、
C、
D、

3、The charging and discharging process of a capacitor is
A、quick at first, slow later.
B、slow at first, quich later.
C、with the same speed.
D、with the stochastic speed.

4、The time constant for the charging process of the capacitor is
A、
B、
C、
D、

5、The time constant for the charging process of the inductor is
A、
B、
C、
D、

6、The initial voltage of the capacitor is zero. The switch is closed at t=0s. When t>0, the expression of is
A、
B、
C、
D、

7、The initial voltage of the capacitor is zero. The switch is closed at t=0s. How long does it need for the capacitor to discharge from 10V to 1V?
A、10s
B、20s
C、about 23s
D、about 46s

8、The initial current of the inductor is zero. The switch is closed at t=0s. When t>0, the expression of is
A、
B、
C、
D、

9、The initial current of the inductor is zero. The switch is closed at t=0s. When t>0, the expression of is
A、
B、
C、
D、

10、The initial current of the capacitor is . The switch is closed at t=0s. When t>0, the expression of is
A、
B、
C、
D、

3 AC Circuits

Test 3: AC Circuits

1、The phasor corresponding to is
A、
B、
C、
D、

2、The time-domain expression for the phasor is
A、
B、
C、
D、

3、The series equivalent impedance of the AC circuit is
A、
B、
C、
D、

4、The parallel equivalent impedance of the AC circuit is
A、
B、
C、
D、

5、If and ， the amplitude of the source voltage is
A、20V
B、70V
C、100V
D、140V

6、If the amplitude of the source voltage is 100V, the amplitude of the current in the AC circuit is
A、5A
B、10A
C、
D、

7、If the amplitude of the source voltage is 20V, the active power (or average power) of the resistor in the AC circuit is
A、10W
B、20W
C、40W
D、80W

8、If the amplitude of the source voltage is 20V, the reactive power of the resistor in the AC circuit is
A、
B、
C、
D、

9、If , the power factor of the AC circuit is
A、
B、
C、0.6
D、0.8

10、The impedance of a capacitor is
A、
B、
C、
D、
E、

11、The impedance of an inductor increases with the increase of the angular frequency.

12、The impedance of a capacitor increases with the increase of the angular frequency.

4 General Analysis Techniques for Circuits

Test 4: General Analysis Techniques for Circuits

1、The current is
A、4A
B、-4A
C、8A
D、-8A

2、The node voltage equation of the node 1 is
A、
B、
C、
D、

3、The node voltage equaton of the node 2 is
A、
B、
C、
D、

4、The loop current equation of the loop 2 is
A、
B、
C、
D、

5、The loop current equation of the loop 3 is
A、
B、
C、
D、

6、The capacitor current is
A、1A
B、0.5A
C、
D、

7、The following circuit can be equivalent to
A、
B、
C、
D、

8、The voltage of Thevenin equivalent voltage source is
A、4V
B、8V
C、12V
D、16V

9、The resistance of Thevenin equivalent resistor is
A、
B、
C、
D、

10、The maximum power that can be obtained by the variable resistance is
A、1W
B、4W
C、8W
D、16W

11、The KCL equation of the node is
A、
B、
C、
D、
E、

12、The KVL equation of the circuit is
A、
B、
C、
D、
E、

13、The reference directions of currents and voltages must be the real directions of currents and voltages.

5 Extensions of Circuit Knowledge

Test 5: Extensions of Circuit Knowledge

1、The voltage of the current source is
A、0V
B、8V
C、16V
D、36V

2、The Thevenin equivalent resistance of the circuit is
A、
B、
C、
D、

3、If the response of the second-order circuit is critically damped, is
A、
B、
C、
D、

4、The equivalent impedance of the circuit is
A、
B、
C、
D、

5、If the amplitude of the AC voltage souce in the circuit with an ideal transformer is 100V, the amplitude of is
A、10A
B、100A
C、5A
D、50A

6、 of the circuit is
A、
B、
C、
D、

7、The Thevenin equivalent resistance of the circuit is
A、
B、
C、
D、

8、If the v-i relation of a two-port network is expressed by hybrid parameter, the equation is
A、
B、
C、
D、

9、The impedance parameter of the two-port network is
A、
B、
C、
D、

10、The possible response of a second-order circuit is
A、overdamped
B、critically damped
C、underdamped
D、constant voltage
E、constant current

11、The superposition theorem is applicable for nonlinear circuits.

6 Applications of Circuit Knowledge

Test 6: Applications of Circuit Knowledge

1、The voltage is
A、1V
B、-1V
C、4V
D、-4V

2、The relation between the input and output of the circuit is
A、
B、
C、
D、

3、The filter circuit is
A、a low-pass filter
B、a high-pass filter
C、a band-pass filter
D、a band-stop filter

4、The filter circuit is
A、a low-pass filter
B、a high-pass filter
C、a band-pass filter
D、a band-stop filter

5、The filter circuit is
A、a low-pass filter
B、a high-pass filter
C、a band-pass filter
D、a band-stop filter

6、The filter circuit is
A、a low-pass filter
B、a high-pass filter
C、a band-pass filter
D、a band-stop filter

7、The amplitude of is
A、0A
B、5A
C、
D、10A

8、The amplitude of the phase voltage in the balanced three-phase circuit is . The amplitude of each phase current is
A、1.1 A
B、
C、
D、

9、If a LC series AC circuit is in resonance, the LC series circuit can be regarded as short circuit, which means that the equivalent impedance is zero.

10、For balenced three-phase voltage sources, if the initial phase angle of the A-phase voltage source is zero degree, the initial phase angle of the C-phase voltage source is -120 degrees.

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