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pully
 3 years ago
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?
pully
 3 years ago
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?

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

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

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

pully
 3 years ago
Best ResponseYou've already chosen the best response.00.48 mJ 58 mJ 0.12 J 0.90 GJ 0.36 J

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

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

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

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

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