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Neiep 600 final Exam (New Update) Questions and Answer Elaborations (GRADED A+), Exams of Electrical and Electronics Engineering

Harvard UniversityElectrical and Electronics Engineering

Neiep 600 final Exam (New Update) Questions and Answer Elaborations (GRADED A+)

Typology: Exams

2023/2024

Available from 06/19/2024

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Neiep 600 final Exam (New Update) Questions
and Answer Elaborations (GRADED A+)
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
pf3
pf4
pf5

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Download Neiep 600 final Exam (New Update) Questions and Answer Elaborations (GRADED A+) and more Exams Electrical and Electronics Engineering in PDF only on Docsity!

Neiep 600 final Exam (New Update) Questions

and Answer Elaborations (GRADED A+)

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 Which of the following would increase the DC working voltage DCWV of a capacitor Increase the plate area and the dielectric thickness Which statement is correct concerning capacitors? Increased plate area, increases capacitance Which of the following is the unit used for measuring capacitance? Farad Current flow from positive to negative is described as conventional flow Current flow from negative to positive is called electron flow By increases the distance between the plates we ________ the charge capacity decrease

How much of the applied voltage will be on a capacitor at T3, if the source voltage is 25 volts 23.7 5 A leading cause of a relay contact failure is due to arcing when a relay opens The capacitor will keep the voltage across the contacts below the point of ionization true Noise suppression capacitors can be used to direct voltage flow __________ to ground spikes A capacitors opposition to changing is measured in ohms and is called If frequency increases, then Xc increases Two series capacitors with a reactance of 75 ohms and 183 ohms respectively, would have a combined reactance of _______ ohms 258 ohms Two parallel capacitors with a reactance of 220 ohms each would have a combined reactance of __________ ohms 110 ohms The most common failures of a capacitor are Shorts, leaks, opens What is the failure if the meter reading across the capacitor is reading zero resistance across the capacitor shorted If you check the output of a power supply, and it shows a lot of ripple, the filter capacitor is probably open

If a capacitive timer starts timing out too quickly, the capacitor probably leaks