QUESTIONS AND ANSWERS GRADED A+
◉ Which of the following is true about capacitors in AC circuits?
Answer: Current leads voltage all the time
◉ What describes a capacitor s ability to store an electrical charge?
Answer: Capacitance
◉ which of the following statements is correct about polarized
electrolytic capacitors? Answer: Voltage polarity must be correct
◉ What is the time constant for a circuit with 150k ohms and 2
microfarad capacitor? Answer: .3 seconds
◉ If frequency is increased in a capacitave circuit what will happen?
Answer: Capacitive reactance will decrease
◉ What happens in a circuit, when the capacitor voltage equals the
source voltage? Answer: Current flow stops in the circuit
◉ In a DC circuit, which is correct about capacitors the instant when
power is applied? Answer: Current is maximum
◉ In the circuit shown in figure 1, what will be the total capacitance?
Answer: 250 u(micro) farads
, ◉ If a circuit has a capacitor of 5 microfrauds and a source voltage of
120 volts DC through a resistance of 200k, how long will it take to fully
charge? Answer: 5 seconds
◉ What happens in a circuit, when the capacitor voltage equals the
source voltage? Answer: Current flow stops in the circuit
◉ which statement best describes one time constant of a capacitor?
Answer: The time it takes to charge to 63.2% of applied voltage
◉ In a DC circuit, which is correct about capacitors the instant when
power is applied? Answer: Current is maximum
◉ If a circuit has a capacitor of 5 microfrauds and a source voltage of
120 volts DC through a resistance of 200k, how long will it take to fully
charge? Answer: 5 seconds
◉ If two capacitors in parrallel have equal reactance of 40 ohms what is
the total reactance? Answer: 20ohms
◉ Which of the following would increase the DC working voltage
DCWV of a capacitor Answer: Increase the plate area and the dielectric
thickness
◉ Which statement is correct concerning capacitors? Answer: Increased
plate area, increases capacitance