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Calculating expended energy in a battery

  • Thread starter sdoyle1
  • Start date
  • #1
23
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Homework Statement


How much energy must a 42 V battery expend to fully charge a 3.62x10-6 F and a 6.11x10-6 F capacitor when they are placed in parallel?


Homework Equations



capacitor in parallel therefore total capacitance is the sum...

The Attempt at a Solution


I thought that you could use U=Vq but apparently you can't because I was getting the wrong answers.. this is the same question that I tried to do before but with different values. HELP :)
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
When in parallel, what is the total capacitance?

How do you find the energy stored in a capacitor?
 
  • #3
23
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Thank you so much!
 

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