Physics - E&M: Dis- and Re-Connecting Capacitors (3 of 16) Both Charged, Same Size, + to +

[@prabhusubramanian1205]

i like your videos because u follow basic rules for all problems...without invoking any shortcuts

[@nanak3363]

2:22 "SINCE C1 =C2 " .But initially capacitances of both capacitors are different . For capacitance to increase we have to increase the area of plates which is one of few factors affecting capacitance . Then how at 2:22 we can say y C1=C2 without making any physical changes ? (and also in q=cv c is kind of proportionality constant ) . Thanks!

[@MichelvanBiezen]

The capacitance of both capacitors is 2 microfarads from the beginning and did not change.

[@AliceKMay]

Sir thank you for your video. I have a question. Why do we add Q1+Q2? My understanding is since the charges are moving from one capacitor to another and they cancel out each other, I thought we should subtract the original capacitances.

[@MichelvanBiezen]

Because each capacitor contains some charge and then when you connect them together they bring a total amount of charge to the circuit.

[@AliceKMay]

@@MichelvanBiezen So it's because it is connected to equal polarities. Is it correct sir?

[@MichelvanBiezen]

Sorry. I am not sure what you are asking.

[@worldacademy1706]

Sir what is difference between q1+q2 and q1-q2 ??

[@MichelvanBiezen]

I am not sure what you are asking. We added the charge on each of the capacitors together before they were connected because we wanted to know the total charge on the capacitors.

[@dalenassar9152]

I hope I am correct in assuming that q=50uC on a 2uF capacitor, via the formula V=q/c, gives V1=50/2=25v and V2=50/2=25v (same final voltage). HOWEVER, I still get that same annoying "energy loss" as an equal voltage LOWER than 25v. Upon connection in parallel, I can still see that spark that haunts me so! I just have a feeling that this spark is related to the final energy loss! I used two 1uF microwave oven capacitors in parallel this time, as a single 2uF capacitor (TOTAL four capacitors). I used a capacitance meter to check the uncharged capacitors first. For initial charge C1 was 20v and C2 was 30v Again, the experiment was done with great care.

[@NeurodiverseGamer]

what kind of math is thos

[@MichelvanBiezen]

The math is at the level of algebra. (But you do need to know the basic concepts of capacitors).

[@gilligilli6161]

Wow I love this method. 😉🙂😉

[@MichelvanBiezen]

Glad you like it!

[@saidalam8606]

Sir A 6 uF capacitor is changed to a potential difference of 120V and then connected an unchanged 4 uF capacitor. Calculate the potential difference across the capacitor. Please Sir solve this problem

[@MichelvanBiezen]

Isn't that exactly the same as the example Physics - E&M: Dis- and Re-Connecting Capacitors (1 of 16) 1-Charged, 1-Uncharged, Same Size and the second video in the playlist: PHYSICS 39.1 CAPACITORS RECONNECTED

[@artishukla9147]

Which country do u belong to

[@MichelvanBiezen]

We are from the United States. (I originally grew up in Belgium)

[@harrisonbennett7122]

Thank you!

[@silviapetrova8562]

thaaaankssss