Capacitors (5 of 9) Calculating the Capacitance of a Capacitor, Worked Examples

Goes through two simple examples of how to calculate the capacitance of a capacitor.
A capacitor is a passive electronic device that stores electric charge on its plates and electrical energy in its electric field. A capacitor contains at least two electrical conductors such as metal plates that are separated by a dielectric. The insulating dielectric acts to keep the metal plates isolated from each other and to increase the capacitor's ability to store charge. Materials commonly used as dielectrics include glass, ceramic, plastic film, paper, mica and air. Unlike a resistor, an ideal capacitor does not dissipate energy. The SI unit of capacitance is the farad (F), which is defined as one coulomb per volt (1 C/V).
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[@Emrass]

Thank you so much for this, I have exams tomorrow and I regret procrastinating. Your tutorial saved my grades

[@stepbystepscience]

You're very welcome! Hope the exams went well.

[@Emrass]

Update: yeah I did good, thanks again

[@vijgenboom2843]

Thank you! ❤

[@stepbystepscience]

You're welcome 😊

[@nimasamieinia9303]

Thanks Knowledge Keeper Of Me

[@shamitsharma8300]

the 2nd ques says that they are ROUND aluminium capacitors ,so parallel plate and circular plate have same formula?

[@stepbystepscience]

Round but flat and round not spherical. So it is still two flat plates.
You can see a listing of all my videos at my website, www.stepbystepscience.com

[@WeirdOne19142]

Quick question. When you say the value of k for "air" is one, are you actually saying the value of k in a VACUUM is one? To me it stands to reason that the presence oxygen and nitrogen gas between the plates would alter the overall permiability due to electronegativity.

[@WeirdOne19142]

I guess what I'm asking is that if you were to place parallel plates in a vacuum, would you get a fractional value for k, and if this is the case is there a stoichiometric standard to express the standard definition for "air" in a system? Put simply: what do you mean by air?

[@arissngoudlefack8233]

Why is't 1.0×10^3
25×10^6 i don't understand

[@sigarcia3457]

How to simplify?

[@stepbystepscience]

How to simplify what?

[@lem09able]

first! and thanks for the tutorial

[@stepbystepscience]

+Lem Manalo You are welcome and thanks. You can see a listing of all my videos at my website, www.stepbystepscience.com

[@maryjoybangate2245]

The last part I got 6.1x 10^-21

[@stepbystepscience]

For the radius did you convert cm to meters and for the plate separation did you convert cm to meters?

[@marlonblando]

for the love of god simplify. there is no reason to make this any more challenging

[@stepbystepscience]

I made it to complicated.....sorry. My goal is of curse to simplify...