Calculate the energy in a capacitor's electric field

  • Thread starter MisterP
  • Start date
  • #1
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Homework Statement


Capacitor has a charge of 0.008C. Capacity is 2 μF. Need to calculate energy of electric field. Answer: 32J

Homework Equations


E = q2/2*C

The Attempt at a Solution


This seems right equation, but instead of 32J I get 16J.. any ideas?
 

Answers and Replies

  • #2
501
92

Homework Statement


Capacitor has a charge of 0.008C. Capacity is 2 μF. Need to calculate energy of electric field. Answer: 32J

Homework Equations


E = q2/2*C

The Attempt at a Solution


This seems right equation, but instead of 32J I get 16J.. any ideas?

I think you are correct and the stated answer is wrong. Unless I am missing some conceptual insight, I believe they have made a calculation error.
 

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