electronics-capacitors Related Question Answers
51. What do variable capacitors use for dielectric?
52. If a charged capacitor is disconnected from a circuit, it will:
53. What is the total current for a 5 MHz, 1 Vac circuit that consists of a 27 pF capacitor and a 1 k resistor connected in parallel?
54. What is the value of a capacitor that can store two coulombs of charge when 500 volts is applied across its plates?
55. The strength of an electric field at a given point is proportional to the potential difference on the plates and inversely proportional to the:
56. How is ac current related to ac voltage in a purely capacitive circuit?
58. For a given charge difference, electrostatic field strength varies according to:
59. A capacitor has 25 V across its plates and a stored charge of 1500 C. What is the capacitance value?
60. A capacitor and an output resistor form a series circuit with a square wave applied. The circuit is:
61. Capacitive reactance values connected in series offer
62. The quantity that represents an ideal capacitor dissipating 0 W of power is
63. If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?
64. What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
65. What will a 1 F capacitor store?
67. What is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?
68. If the reactive power of a circuit is 50 mW while the apparent power is 64 mW, then what is the true power of the circuit?
70. To find the total capacitance of capacitors in parallel, sum the values of the individual capacitors.
72. A capacitor is charged when one of its plates has more electrons than the other plate.
73. A 10 F capacitor will have more capacitive reactance than a 20 F capacitor in a 60 Hz circuit.
74. Ceramic capacitors have higher voltage ratings than electrolytic capacitors.
75. Between any two time constants, the charge on a capacitor changes about 63%.
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