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Home ‣ Electronics ‣ Time Response of Reactive Circuits See What Others Are Saying!
- Question
Which of the following is true for a capacitor?
Options- A. A capacitor acts like a short to instantaneous changes in current.
- B. A capacitor's voltage cannot change instantaneously.
- C. A capacitor acts like an open to dc.
- D. All of the above
- Correct Answer
- All of the above
- 1. ___ occurs in a transformer when some of the primary flux lines pass through the air instead of the core.
Options- A. Hysteresis loss
- B. Magnetic flux leakage
- C. Winding resistance
- D. Winding capacitance Discuss
- 2. Making the load resistance appear the same as the source's internal resistance is called _____.
Options- A. maximum power transfer
- B. reflected resistance
- C. impedance matching
- D. reflected load Discuss
- 3. If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by 2.
Options- A. True
- B. False Discuss
- 4. A digital voltmeter can be used to measure resistance.
Options- A. True
- B. False Discuss
- 5. A group of force lines going from the north pole to the south pole of a magnet is called the magnetic ___.
Options- A. retentivity
- B. reluctance
- C. hysteresis
- D. flux Discuss
- 6. In a resistive circuit, if the voltage increases, the current will increase.
Options- A. True
- B. False Discuss
- 7. An essential requirement of a feedback oscillator is a phase shift around the feedback loop of 360°.
Options- A. True
- B. False Discuss
- 8. In an n-type JFET, current will flow when a positive voltage is applied to the drain and a negative voltage is applied to the source.
Options- A. True
- B. False Discuss
- 9. Kirchhoff's current law for parallel circuits states that the:
Options- A. sum of all branch voltages equals zero
- B. total circuit resistance is less than the smallest branch resistor
- C. sum of currents into a junction is equal to the difference of all the branch currents
- D. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction Discuss
- 10. Which of the following statements is true?
Options- A. The voltage to which a capacitor is charged can change instantaneously.
- B. The current in a capacitive circuit takes time to change.
- C. A fully charged capacitor appears as a short to dc current.
- D. An uncharged capacitor appears as a short to an instantaneous change in current. Discuss
More questions
Correct Answer: Magnetic flux leakage
Correct Answer: impedance matching
Correct Answer: False
Correct Answer: True
Correct Answer: flux
Correct Answer: True
Correct Answer: True
Correct Answer: True
Correct Answer: sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction
Correct Answer: An uncharged capacitor appears as a short to an instantaneous change in current.
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