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Author Question: How long will it take a charged 80-mF capacitor to lose 20 of its initial energy when it is allowed ... (Read 89 times)

javeds

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on: Jul 28, 2018
How long will it take a charged 80-mF capacitor to lose 20 of its initial energy when it is allowed to discharge through a 45-W resistor?
 a. 0.92 ms
  b. 0.64 ms
  c. 0.40 ms
  d. 0.19 ms
  e. 0.80 ms

Question 2

In an RC circuit, what fraction of the final energy is stored in an initially uncharged capacitor after it has been charging for 3.0 time constants?
 a. 0.84
  b. 0.90
  c. 0.75
  d. 0.60
  e. 0.03


ergserg

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

C

Answer to Question 2

B


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javeds

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


ergserg

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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