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Welcome to

Passive Components

Capacitors, inductors, and resistors are the essential passive components used in electrical and electronic circuits. They are constructed with a variety of materials: ceramics, metals, conductive polymers, and films.

NEW! How much do you REALLY know about film capacitors? They have low ESR and high voltage ratings. Take our 25-question quiz to find out!

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Polymer Capacitor Banner

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Inductors

Inductors are one of the big three passive components; how much do you know about them? Meet the winners of our Experimenting with Inductors competition. Also, watch The Learning Circuit videos: Inductors & Solenoids, In-depth on Inductors with Kemet part 1, and In-depth on Inductors with Kemet part 2. Take the Inductors Quiz to show how much you've learned, or share your inductors projects/knowledge with us.

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Polymer Capacitors

Our Polymer Capacitors Campaign includes a quiz, two videos, and a competition. Read all the finishers' experiment blogs, watch our videos, and take the quiz to show how much you've learned about the subject. Or share your polymer capacitors projects/knowledge with us.

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Film Capacitors Quiz

Film capacitors have low ESR, efficient capacitance- voltage (CV), and high voltage ratings. But how much do you REALLY know about them? Take our 25-question film capacitors quiz to find out. If you score 100%, we will send you a secret prize. Have fun!

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Downsizing MLCCs Quiz

Do you know how to optimize design with smaller capacitors? Take our quiz to see how much you know. Also check out our WorkBench Wednesdays 30th episode and the MLCC Q&A interview video with Murata.

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Recent Content

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	Re: Fluid Control Solenoid Unusual Readings 3 weeks ago	by jw0752
	Re: How can I deal with resistors when I'm colorblind? 6 months ago	by dougw
	Help identifying this part please, can't find a replacement 10 months ago	by charlie292
	Re: Information on the clear connection film to an LCD display 10 months ago	by beacon_dave
	Re: How Do I Replace a 5 Pin Volume Control (Potentiometer/Variable Resistor)? 12 months ago	by yuvaraj123

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jw0752

in Passive Components3 weeks ago (Show more Show less)

Fluid Control Solenoid Unusual Readings

This is the coil from a solenoid that is used in a dental counter top sterilizer. When it is energized it pulls a plunger away from a valve seat and lets water flow through the valve and into the sterilization chamber. While I was working on a sterilizer a while back I got some really strange readings on my ohmmeter when I attempted to verify… (Show more Show less)

in Passive ComponentsLike (4) • Report

7 repliesShow more activityShow more activity

jw0752

(to genebren) 3 weeks ago (Show more Show less)

Hi Gene, Thank you for your insight. The coil definitely had an internal bridge. I hooked it up to 100V DC and observed the polarity of the magnetic field. When I reversed the polarity of the 100 VDC the field maintained its previous polarity. Mystery solved. John

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pchan

in Passive Components1 year ago (Show more Show less)

Inductors Quiz

Inductors Quiz sponsored by Quiz | Experimenting with Inductors | In-depth on Inductors with KEMET Video | Inductors & Solenoids Video | Homepage This is a 25-question quiz focusing on information regarding various aspects of inductors, including theory, magnetic materials, characteristics, and specifications of SMD power inductors. …

in Passive ComponentsLike (27) • Report

95 commentsShow more activityShow more activity

Gordon Margulieux 1 month ago (Show more Show less)

Interesting

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pchan

in Passive Components5 months ago (Show more Show less)

Film Capacitor Quiz

Film Capacitor Quiz sponsored by Quiz | Power & Energy | Industrial Automation | Kemet Electronics | Passive Components This is a 25-question quiz focusing on information regarding various aspects of film capacitors, including characteristics, classes, construction, applications, and specifications. To earn the Film Capacitor Badge,…

in Passive ComponentsLike (16) • Report

26 commentsShow more activityShow more activity

James Lewis (to beacon_dave)2 months ago (Show more Show less)

Yup, bad wording. #7's explanation is worded poorly. #17's explanation contains a typo. X-Capacitors are only rated for Line-to-Line. Y-Capacitors are intended for Line-to-Ground but can also be used as Line-to-Line. (however, Y-caps rarely get designed in as line-to-line because of their size/cost, relative to an X-rated capacitor with similar…

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pchan

in Passive Components5 months ago (Show more Show less)

Film Capacitor Quiz Resource

Film Capacitor Quiz Resource sponsored by Passive Component | Power Energy | Industrial Automation | Kemet Electronics | Return to Quiz Question 1: In a film capacitor, the anode and cathode are formed by metal foil or by metalizing the film material. The film is the capacitor's dielectric element. Power Film Capacitors Question 2: Vapor…

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Modified by pchan • 5 months ago

Latest Poll

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Poll: Do You Know The Scientists Who Developed Classical Electromagnetic Theory?

Classical electromagnetic theory explains how electromagnetic forces interact with charges and currents based on a Newtonian model.

Here's the poll question:

In 1820 _________ discovered that when an electric current flows in a conductor a magnetic field is produced. Less than a decade later, ________ established the relationship between current and the magnetic field. In 1831, ________ discovered that a changing magnetic field causes current to flow in a closed electric circuit linked by a magnetic field. _________demonstrated that there is a relationship between a changing magnetic field and the induced current. ________ proved that magnetic poles cannot exist in isolation. In 1865, _______ unified electromagnetism theory in four equations that completely describe the behavior of electric and magnetic fields.

(If you like this quiz question, stay tuned to the element14 Quiz Series. In September, we will publish our Quiz on Inductors. This quiz question is a taste of what you will be quizzed on. As usual, if you get 100%, you will earn a secret prize.

Randall Scasny

element14 Quiz Maker

Ampere, Faraday, Lenz, Gauss, Oersted, Maxwell (6%)
2/32
Lenz, Gauss, Oersted, Maxwell, Ampere, Faraday (3%)
1/32
Oersted, Ampere, Faraday, Lenz, Gauss, Maxwell (81%)
26/32
Gauss, Maxwell, Oersted, Ampere, Faraday, Lenz (0%)
0/32
Faraday, Lenz, Gauss, Maxwell, Oersted, Ampere (9%)
3/32

Created by rscasny on Sep 11, 2019 in Passive Components

32 Votes - 11 Comments

Recent Blog Posts

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Capacitor Leakage Experiments

by jc2048 in Passive Components on Jul 19, 2019

“Introduction I'm having a bit of fun experimenting. With capacitor leakage. It's all a bit ad hoc and Heath Robinson- ish, and I'm probably setting a very bad example of how to go about more...
Decoupling Capacitor Experiments

by jc2048 in Passive Components on Jun 22, 2019

“Introduction I haven't done much blogging recently but, enthused by all the activity going on at the moment, I thought it might be interesting to take a quick look at the use of capacitors more...
Ammeter Shunt FAQ

by donblankenburg in Passive Components on Jan 25, 2019

“DC Ammeter shunt – The term DC ammeter shunt stems from one of the early uses of the devices as a means of measuring DC currents in a circuit utilizing a simple analog milli-volt meter. more...
Your Mission Should You Decide to Accept it: Take My Polymer Capacitor Quiz and Pass It!

by rscasny in Passive Components on Jan 15, 2019

“Mission Impossible was always a favorite TV show of mine. It was a fast paced thriller for its time (in black and white, I believe) and everyone on the IM Force did their job flawlessly, especially more...
Building a Resistor Kit - and BoM Upload

by shabaz in Passive Components on Oct 26, 2018

“I wanted to build a resistor kit for myself. Kits are available ready-made, but they are expensive. The lower-cost kits have a 5% tolerance but for prototype development purposes I'd rather just go more...

Featured Content

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Items tagged with passive_featured

Subject		Author
	The Learning Circuit 02: Series & Parallel Circuits 1 year ago in The Learning Circuit	by tariq.ahmad
	Building Kelvin (4-Wire) Test Leads 2 years ago in Test & Tools	by shabaz
	The Learning Circuit 17: Resistors 2 years ago in The Learning Circuit	by tariq.ahmad
	Your Mission Should You Decide to Accept it: Take My Polymer Capacitor Quiz and Pass It! 2 years ago in Passive Components	by rscasny
	The Learning Circuit 05: Ohm's Law with Breadboard Circuits 3 years ago in The Learning Circuit	by tariq.ahmad
	Measuring Capacitor Characteristics 2 years ago in Passive Components	by shabaz
	Seeking Someone to Write a Tutorial on Charge Pumps Including Building Some Examples 2 years ago in Passive Components	by rscasny
	Arduino: R-2R: "Resistance is..."? 3 years ago in Jon Clift's Blog	by jc2048