Electrical

Electrical Questions? Ask an Electrician Online.

Ask an Expert,

Get an Answer ASAP!

Customer Question

dielectric constant? A. Polystyrene B. Glass C. Mica 2...

1. Which of the following materials has the lowest dielectric constant?

A. Polystyrene

B. Glass

C. Mica

2. A series RLC circuit contains an inductor with a value of 200 millihenries and a capacitor with a value of

0.1 microfarad. What is the resonant frequency of this circuit?

A. 1,126 Hz

B. 2,521 Hz

C. 564 Hz

D. 968 Hz

3. When creating an impedance triangle for a series RC circuit, the capacitive reactance is plotted on the

A. X axis.

B. Y axis.

C. Z axis.

D. hypotenuse.

4. A series RC circuit contains a 0.5 microfarad capacitor and a 500 ohm resistor. The circuit is operating

at a frequency of 2,000 Hz. What is the impedance of the circuit?

A. 809 ohms

B. 525 ohms

C. 500 ohms

D. 2,006 ohms

5. If a circuit's frequency increases, the capacitive reactance

A. will decrease.

B. will also increase.

C. and the phase angle will both remain constant.

D. will remain constant, but the phase angle will change.

6. In which one of the following figures is current flow the highest through the capacitor?

A.

B.

C.

D.

7. In a series RC circuit, if the resistance is 8,000 ohms and X is 6,000 ohms, what is the impedance of the

circuit?

A. 8,600 ohms

B. 10,000 ohms

C. 9,200 ohms

D. 14,000 ohms

8. In a capacitive AC circuit, the current is

A. lagging the voltage.

B. leading the voltage.

C. in phase with the voltage.

D. unrelated to the voltage.

Use the figure above to answer the following question.

9. What is the capacitive reactance of the circuit in the illustration?

A. 45,297

B. 39,809

C. 65,205

D. 33,204

10. What is the capacitive reactance of a 1 µF capacitor at a frequency of 60 Hz?

A. 26,549

B. 13,120

C. 1324

D. 2654

11. If the frequency to the circuit decreases, the capacitive reactance

A. will also decrease.

B. will increase.

C. remains constant but the phase angle changes.

D. remains constant as does the phase angle.

12. A series RC circuit contains a 0.01 microfarad capacitor and a 2,000 ohm resistor, and has a frequency

of 500 HZ. What is the impedance of the circuit?

A. 52,285 ohms

B. 90,285 ohms

C. 42,164 ohms

D. 31,910 ohms

13. Which of the following materials would not be used as a dielectric material in a capacitor?

A. Tantalum

B. Polystyrene

C. Paper

D. Aluminum foil

14. A circuit contains three capacitors, a 0.05 µF, a 0.002 µF, and a 0.15 µF capacitor in series. What is

the total capacitance of this circuit?

A. .202 µF

B. 0.0019 µF

C. 106 µF

D. 0.0114 µF

15. A series RC circuit has a source voltage of 24 VAC and an impedance of 252 ohms. What is the circuit

current?

A. 95 A

B. 0.095 A

C. 0.95 A

D. 9.5 A

16. If a 0.02 µF capacitor is in an AC circuit with a frequency of 1kH, what is the capacitive reactance?

A. 6224

B. 3981

C. 15,924

D. 7962

17. What would be the resonant frequency for a series RLC circuit with the following components: a 1 kV

resistor, a 900 mH inductor, and a 0.014 mF capacitor?

A. 16,790 Hz (rounded)

B. 44.86 Hz (rounded)

C. 22.29 mHz (rounded)

D. 35.46 kHz (rounded)

Use the figure above to answer the following question.

18. What is the phase angle in the circuit in the illustration?

A. 1.007°

B. 48.0°

C. 16.4°

D. 8.051°

19. An AC circuit contains a 0.01 microfarad capacitor and 0.06 micro farad capacitor that are connected

in series. What is the total capacitance of this circuit?

A. 0.0086 microfarad

B. 0.086 microfarad

C. 0.007 microfarad

D. 0.07 microfarad

Use the figure above to answer the following question.

20. What is the circuit current for the circuit in the illustration?

A. 124 mA

B. 58 mA

C. 29 mA

D. 23 mA

Use the figure above to answer the following question.

21. What is the impedance of the circuit shown in the illustration?

A. 5342

B. 1335

C. 1278

D. 11,752

End of exam

22. Which of the following materials has the highest dielectric constant?

A. Polypropylene

B. Mica

C. Paper

D. Glass

23. What is the time constant of a 0.1 microfarad capacitor and a 10,000 ohm resistor that are connected in

series?

A. 0.01 second

B. 1,000 microseconds

C. 1 second

D. 10 milliseconds

Use the figure above to answer the following question.

24. What is the circuit current in the circuit in the illustration?

A. 29 mA

B. 125 µA

C. 18 mA

D. 58 mA

25. A 0.015 micro arad capacitor and 0.125 microfarad capacitor are connected in parallel in a circuit.

What is the total capacitance of this circuit?

A. 0.140 microfarad

B. 0.135 microfarad

C. 0.110 microfarad

D. 0.120 microfarad

A. Polystyrene

B. Glass

C. Mica

2. A series RLC circuit contains an inductor with a value of 200 millihenries and a capacitor with a value of

0.1 microfarad. What is the resonant frequency of this circuit?

A. 1,126 Hz

B. 2,521 Hz

C. 564 Hz

D. 968 Hz

3. When creating an impedance triangle for a series RC circuit, the capacitive reactance is plotted on the

A. X axis.

B. Y axis.

C. Z axis.

D. hypotenuse.

4. A series RC circuit contains a 0.5 microfarad capacitor and a 500 ohm resistor. The circuit is operating

at a frequency of 2,000 Hz. What is the impedance of the circuit?

A. 809 ohms

B. 525 ohms

C. 500 ohms

D. 2,006 ohms

5. If a circuit's frequency increases, the capacitive reactance

A. will decrease.

B. will also increase.

C. and the phase angle will both remain constant.

D. will remain constant, but the phase angle will change.

6. In which one of the following figures is current flow the highest through the capacitor?

A.

B.

C.

D.

7. In a series RC circuit, if the resistance is 8,000 ohms and X is 6,000 ohms, what is the impedance of the

circuit?

A. 8,600 ohms

B. 10,000 ohms

C. 9,200 ohms

D. 14,000 ohms

8. In a capacitive AC circuit, the current is

A. lagging the voltage.

B. leading the voltage.

C. in phase with the voltage.

D. unrelated to the voltage.

Use the figure above to answer the following question.

9. What is the capacitive reactance of the circuit in the illustration?

A. 45,297

B. 39,809

C. 65,205

D. 33,204

10. What is the capacitive reactance of a 1 µF capacitor at a frequency of 60 Hz?

A. 26,549

B. 13,120

C. 1324

D. 2654

11. If the frequency to the circuit decreases, the capacitive reactance

A. will also decrease.

B. will increase.

C. remains constant but the phase angle changes.

D. remains constant as does the phase angle.

12. A series RC circuit contains a 0.01 microfarad capacitor and a 2,000 ohm resistor, and has a frequency

of 500 HZ. What is the impedance of the circuit?

A. 52,285 ohms

B. 90,285 ohms

C. 42,164 ohms

D. 31,910 ohms

13. Which of the following materials would not be used as a dielectric material in a capacitor?

A. Tantalum

B. Polystyrene

C. Paper

D. Aluminum foil

14. A circuit contains three capacitors, a 0.05 µF, a 0.002 µF, and a 0.15 µF capacitor in series. What is

the total capacitance of this circuit?

A. .202 µF

B. 0.0019 µF

C. 106 µF

D. 0.0114 µF

15. A series RC circuit has a source voltage of 24 VAC and an impedance of 252 ohms. What is the circuit

current?

A. 95 A

B. 0.095 A

C. 0.95 A

D. 9.5 A

16. If a 0.02 µF capacitor is in an AC circuit with a frequency of 1kH, what is the capacitive reactance?

A. 6224

B. 3981

C. 15,924

D. 7962

17. What would be the resonant frequency for a series RLC circuit with the following components: a 1 kV

resistor, a 900 mH inductor, and a 0.014 mF capacitor?

A. 16,790 Hz (rounded)

B. 44.86 Hz (rounded)

C. 22.29 mHz (rounded)

D. 35.46 kHz (rounded)

Use the figure above to answer the following question.

18. What is the phase angle in the circuit in the illustration?

A. 1.007°

B. 48.0°

C. 16.4°

D. 8.051°

19. An AC circuit contains a 0.01 microfarad capacitor and 0.06 micro farad capacitor that are connected

in series. What is the total capacitance of this circuit?

A. 0.0086 microfarad

B. 0.086 microfarad

C. 0.007 microfarad

D. 0.07 microfarad

Use the figure above to answer the following question.

20. What is the circuit current for the circuit in the illustration?

A. 124 mA

B. 58 mA

C. 29 mA

D. 23 mA

Use the figure above to answer the following question.

21. What is the impedance of the circuit shown in the illustration?

A. 5342

B. 1335

C. 1278

D. 11,752

End of exam

22. Which of the following materials has the highest dielectric constant?

A. Polypropylene

B. Mica

C. Paper

D. Glass

23. What is the time constant of a 0.1 microfarad capacitor and a 10,000 ohm resistor that are connected in

series?

A. 0.01 second

B. 1,000 microseconds

C. 1 second

D. 10 milliseconds

Use the figure above to answer the following question.

24. What is the circuit current in the circuit in the illustration?

A. 29 mA

B. 125 µA

C. 18 mA

D. 58 mA

25. A 0.015 micro arad capacitor and 0.125 microfarad capacitor are connected in parallel in a circuit.

What is the total capacitance of this circuit?

A. 0.140 microfarad

B. 0.135 microfarad

C. 0.110 microfarad

D. 0.120 microfarad

Show More

Show Less

Was this answer helpful?

A new question is answered every 9 seconds

How JustAnswer works:

- Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
- Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
- 100% Satisfaction GuaranteeRate the answer you receive.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal

...leave nothing to chance.

...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

Bagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

Los Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

Hesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

Kernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

Woodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

Elkton, Maryland

< Previous | Next >

Mike

Master Electrician

1,426 satisfied customers

Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer

Jason

Service Technician

3,942 satisfied customers

Over 20 years of experience in all types of installations, troubleshooting, and repairs.

Mike G.

Master Electrician

7,826 satisfied customers

Proven Professional 48 years Experience

Kevin

Licensed Electrical Contractor

3,870 satisfied customers

31 years Licensed Electrical Contractor in Illinois, Adjunct College Electrical Instructor, Former Electrical Inspector, Diploma: Digital Electronics, FCC Technician License

AssuredElectrical

Master Electrician

3,264 satisfied customers

Contractor-42+ Years in the ElectricalTrade

electrifier

Master Electrician

1,458 satisfied customers

Electrical contractor and electrical inspector for over 24 years with phone and networking expertise

Rich

Master Electrician

1,115 satisfied customers

Over 35 years residential, commercial, industrial wiring, install, troubleshoot, service, maintain

< Previous | Next >

Related Electrical Questions

every time i turn on my ac unit my power goes out WHY

every time i turn on my ac unit my power goes out WHY?… read more

Sear Dehumidifier trips the breaker. Could this be a faulty

Sear Dehumidifier trips the breaker. Could this be a faulty capacitor?… read more

How do I identify the VALUE of SMD type capacitors (other than

How do I identify the VALUE of SMD type capacitors (other than by removing and measuring. Grateful for any light you can shed on the problem, Regards, Peter Gill.… read more

I have an attic fan that won't spin. When I turn it on the

I have an attic fan that won't spin. When I turn it on the motor hums and the fan moves back and forth a little like it doesn't know which direction to go. I can push it along to get it spinning but i… read more

1. Which of the following materials has the lowest

1. Which of the following materials has the lowest dielectric constant? A. Polystyrene B. Glass C. Mica 2. A series RLC circuit contains an inductor with a value of 200 millihenries and a capacitor wi… read more

A customer reports a recent drop in power factor from 92% to

A customer reports a recent drop in power factor from 92% to 88%. How would you handle this request for assistance? What measurement would you take? What type of meter would you use? A customer has in… read more

Replacing a capacitor because bulbs were flashing. Replacing

Replacing a capacitor because bulbs were flashing. … read more

I am trying to replace a cbb6-1 capacitor in a ceiling fan

i am trying to replace a cbb6-1 capacitor in a ceiling fan the company, Craftmade sent me TWO capacitors, both marked cbb6-1. the orginal fan has one larger capacior … read more

Capacitor and switch unable to identify, no parts are

capacitor and switch unable to identify JA: I'll do all I can to help. How long have you been dealing with this? Customer: no parts are available locally JA: Do you plan on doing the work yourself? Cu… read more

I am trying to replace a five wire capacitor on a ceiling

i am trying to replace a five wire capacitor on a ceiling fan. … read more

Ceiling fan capacitor 4wire 6,5 & 4.8 uf. Just now. Orange

Ceiling fan capacitor 4wire 6,5 & 4.8 uf JA: I'll do all I can to help. How long have you been dealing with this? Customer: Just now JA: Do you plan on doing the work yourself? Customer: Yes JA: Anyth… read more

I need a 3 wire Ball fan capacitor, SK brand SH-CAP, 4uf

I need a 3 wire Ball fan capacitor JA: I'll do all I can to help. How long have you been dealing with this? Customer: SK brand SH-CAP JA: Do you plan on doing the work yourself? Customer: 4uf +10%-0 3… read more

I have power to my capacitor on my outside a.c. unit, No

I have power to my capacitor on my outside a.c. unit … read more

I HAVE A PROBLEM WITH MY MOTOR CAPACITORS I HAVE A BALDOR

HELLO I HAVE A PROBLEM WITH MY MOTOR CAPACITORS I HAVE A BALDOR L1510T MOTOR IN AIR COMPRESSOR. I TOOK THE CAPACITORS OUT TO REPLACED THEM BUT I FORGOT HOW THEY GOING CONNECTED, DO YOU THINK CAN HELP … read more

Capacitor has 5 wires. Left side, two day. Capacitor has 5

two day. Capacitor has 5 wires. 2 grey on left side, red, brow purple on right side. Capacit … read more

I have a 220vac 5hp capacitor motor. It has always worked

I have a 220vac 5hp capacitor motor. It has always worked fine forward and reverse. But it sat unused for several years and I was going to test a generate and the motor would try to start but would no… read more

We are trying to replace a CBB61 Capacitor to a ceeiling

We are trying to replace a BM CBB61 Capacitor to a ceeiling fan. It has 5 wires. 3 on one end for the speeds and 2 the same color on theother. The original ires was out of thefan so we need to know wh… read more

I have a Philips 71A6071-001D Ballast and capacitor no

I have a Philips 71A6071-001D Ballast and capacitor no starter need to hook up to a 240 watt have 2-com wires, 1 Cap wire, 1-240 wire ? … read more

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.