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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?
 one year ago
 one year 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?
 one year ago
 one year ago

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arcticf0xBest ResponseYou've already chosen the best response.1
Do you know how to find the capacitance when charge and voltage are given?
 one year ago

arcticf0xBest 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.
 one year ago

pullyBest 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
 one year ago

pullyBest ResponseYou've already chosen the best response.0
0.48 mJ 58 mJ 0.12 J 0.90 GJ 0.36 J
 one year ago

rajathsbhatBest ResponseYou've already chosen the best response.0
@pully, are these the options?
 one year ago

rajathsbhatBest ResponseYou've already chosen the best response.0
when i followed @arcticf0x's method, i got 57.6 mJ
 one year ago

arcticf0xBest 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
 one year ago

ahmedanbarBest ResponseYou've already chosen the best response.0
i don't understand the answer i have the same question
 one year ago

pullyBest 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
 one year ago
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