Capacitor Questions and Answers
A capacitor is a key component in electronics and is frequently featured in aptitude questions and answers for exams like GATE, SSC JE, and PSU technical tests. It stores electrical energy in an electric field and plays a vital role in filtering, timing, and energy storage circuits. Understanding capacitor behavior—like charging, discharging, and reactance—is crucial for solving numerical and conceptual questions. This article provides aptitude questions with explanations that simplify the theory and application of capacitors, helping engineering students and aspirants build a strong conceptual foundation for their placement or competitive exams.
Capacitor
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48 questions
41. What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
- 100.0 kHz to 155.0 kHz
- 147.5 kHz to 152.5 kHz
- 4500 kHz to 295.5 kHz
- 149,970 Hz to 150,030 Hz
42. What effect will a parallel tank have upon final filter current?
- very little
- The bandpass frequencies will change.
- The frequency cutoff will change.
- The impedance will block output.
43. When a parallel circuit resonates it is said to:
- flywheel
- oscillate
- both of the above
- none of the above
44. When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:
- low-pass filter
- high-pass filter
- band-stop filter
- bandpass filter
45. At resonance, the term bandwidth includes all frequencies that allow what percentage of maximum current to flow?
- 50
- 62.3
- 70.7
- 95.3
46. What is the true power consumed in a 30 V series RLC circuit if Z = 20 ohms and R = 10 ohms?
- 15.0 watts
- 22.5 watts
- 30.0 watts
- 45.0 watts
47. What is the current phase angle for a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A, and IR = 3.5 A?
- 76.7 degrees
- –4.25 degrees
- 88.8 degrees
- –76.7 degrees
48. At any resonant frequency, what voltage is measured across the two series reactive components?
- applied
- reactive
- zero
- inductive and capacitive