Neiep 600 final Exam 2023| 44
Questions with solved Answers.
In capacitors, what is the purpose of the dielectric? - -Prevent arcing within the
capacitor
-Which of the following is true about capacitors in AC circuits? - -Current leads voltage
all the time
-What describes a capacitor s ability to store an electrical charge? - -Capacitance
-which of the following statements is correct about polarized electrolytic capacitors? - -
Voltage polarity must be correct
-What is the time constant for a circuit with 150k ohms and 2 microfarad capacitor? -
-.3 seconds
-If frequency is increased in a capacitave circuit what will happen? - -Capacitive
reactance will decrease
-What happens in a circuit, when the capacitor voltage equals the source voltage? - -
Current flow stops in the circuit
-In a DC circuit, which is correct about capacitors the instant when power is applied? -
-Current is maximum
-In the circuit shown in figure 1, what will be the total capacitance? - -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? - -5 seconds
-What happens in a circuit, when the capacitor voltage equals the source voltage? - -
Current flow stops in the circuit
-which statement best describes one time constant of a capacitor? - -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? -
-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? - -5 seconds
-If two capacitors in parrallel have equal reactance of 40 ohms what is the total
reactance? - -20ohms
Questions with solved Answers.
In capacitors, what is the purpose of the dielectric? - -Prevent arcing within the
capacitor
-Which of the following is true about capacitors in AC circuits? - -Current leads voltage
all the time
-What describes a capacitor s ability to store an electrical charge? - -Capacitance
-which of the following statements is correct about polarized electrolytic capacitors? - -
Voltage polarity must be correct
-What is the time constant for a circuit with 150k ohms and 2 microfarad capacitor? -
-.3 seconds
-If frequency is increased in a capacitave circuit what will happen? - -Capacitive
reactance will decrease
-What happens in a circuit, when the capacitor voltage equals the source voltage? - -
Current flow stops in the circuit
-In a DC circuit, which is correct about capacitors the instant when power is applied? -
-Current is maximum
-In the circuit shown in figure 1, what will be the total capacitance? - -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? - -5 seconds
-What happens in a circuit, when the capacitor voltage equals the source voltage? - -
Current flow stops in the circuit
-which statement best describes one time constant of a capacitor? - -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? -
-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? - -5 seconds
-If two capacitors in parrallel have equal reactance of 40 ohms what is the total
reactance? - -20ohms
