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Author Question: When a capacitor has a charge of magnitude 80 C on each plate the potential difference across the ... (Read 27 times)

schs14

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  • Posts: 569
on: Jul 28, 2018
When a capacitor has a charge of magnitude 80 C on each plate the potential difference across the plates is 16 V. How much energy is stored in this capacitor when the potential difference across its plates is 42 V?
 a. 1.0 mJ
  b. 4.4 mJ
  c. 3.2 mJ
  d. 1.4 mJ
  e. 1.7 mJ

Question 2

A 4.0-mF capacitor initially charged to 50 V and a 6.0-mF capacitor charged to 30 V are connected to each other with the positive plate of each connected to the negative plate of the other. What is the final charge on the 6.0-mF capacitor?
 a. 20 mC
  b. 8.0 mC
  c. 10 mC
  d. 12 mC
  e. 230 mC


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kiamars2010

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Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

d


schs14

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  • Posts: 569
Reply 2 on: Jul 28, 2018
Gracias!

Laurenleakan

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  • Posts: 309
Reply 3 on: Yesterday
Excellent

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