Timeline for Decrease in stored energy after connection of another capacitor
Current License: CC BY-SA 3.0
12 events
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| Apr 13, 2017 at 12:32 | history | edited | CommunityBot |
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| Jul 11, 2013 at 9:49 | vote | accept | user7777777 | ||
| Jul 10, 2013 at 11:11 | comment | added | Andy aka | I checked with a simulator and this agrees with your answer - for a very small value of resistance, the peak current is massive and the energy taken from the circuit by the resistor's heat is 7.5mJ (This was with 2 x 3uF caps not a 3uF and 6uF). Lowering the resistor or increasing it does exactly the same - 7.5mJ lost forever!! | |
| Jul 10, 2013 at 10:23 | comment | added | Wouter van Ooijen | Or check the math (Vasiliy has done it for you). | |
| Jul 10, 2013 at 10:22 | comment | added | Andy aka | @WoutervanOoijen Yeah I've been thinking about it and it doesn't add up. I feel a simulation is necessary!! | |
| Jul 10, 2013 at 10:12 | comment | added | Wouter van Ooijen | @Andy: sadly, nature is not obliged to comply with our intuition. For any non-zero resistance Jim's answer is wrong. | |
| Jul 10, 2013 at 9:58 | comment | added | Andy aka | I'm not satisfied with this answer Wouter. I think Jim's hits the spot although I do realize that in practice, unsustainable currents will flow!!! | |
| Jul 10, 2013 at 7:26 | comment | added | Wouter van Ooijen | Which spark? If there was a spark (you did not mention one) that will of course have dissipated some energy. But that spark was also part of a (obviously not zero ohm) path, so might as well say that it was dissipated in the conducting path between the capacitors. | |
| Jul 10, 2013 at 7:07 | vote | accept | user7777777 | ||
| Jul 11, 2013 at 9:49 | |||||
| Jul 10, 2013 at 7:06 | comment | added | user7777777 | @ Wouter van Ooijen So is it wrong to say that, the energy disapeared in spark? | |
| Jul 10, 2013 at 6:52 | history | edited | Wouter van Ooijen | CC BY-SA 3.0 |
added 122 characters in body
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| Jul 10, 2013 at 6:45 | history | answered | Wouter van Ooijen | CC BY-SA 3.0 |