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pully
Group Title
When a capacitor has a charge of absolute value 80 µC on each plate the potential difference across the plates is 10 V. How much energy is stored in this capacitor when the potential difference across its plates is 120 V?
 2 years ago
 2 years ago
pully Group Title
When a capacitor has a charge of absolute value 80 µC on each plate the potential difference across the plates is 10 V. How much energy is stored in this capacitor when the potential difference across its plates is 120 V?
 2 years ago
 2 years ago

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arcticf0x Group TitleBest ResponseYou've already chosen the best response.1
Do you know how to find the capacitance when charge and voltage are given?
 2 years ago

arcticf0x Group TitleBest ResponseYou've already chosen the best response.1
Anyway, use q=C*V to find C. Plug it into E=1/2*C*V^2.
 2 years ago

pully Group TitleBest ResponseYou've already chosen the best response.0
are you sure from this laws :D I applied this rules and the answer is wrong :S
 2 years ago

pully Group TitleBest ResponseYou've already chosen the best response.0
0.48 mJ 58 mJ 0.12 J 0.90 GJ 0.36 J
 2 years ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.0
@pully, are these the options?
 2 years ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.0
when i followed @arcticf0x's method, i got 57.6 mJ
 2 years ago

pully Group TitleBest ResponseYou've already chosen the best response.0
I got 5.76x10^10
 2 years ago

pully Group TitleBest ResponseYou've already chosen the best response.0
so it will be 58 mj
 2 years ago

arcticf0x Group TitleBest ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=1%2F2*%2880*10^%286%29%2F10%29*120^%282%29
 2 years ago

ahmedanbar Group TitleBest ResponseYou've already chosen the best response.0
i don't understand the answer i have the same question
 2 years ago

pully Group TitleBest ResponseYou've already chosen the best response.0
Apply this Ahmed q=C*V to find C. Plug it into E=1/2*C*V^2. Then you will get 57.6 mJ
 2 years ago
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