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Author Question: Very large capacitors have been considered as a means for storing electrical energy. If we ... (Read 65 times)

dejastew

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on: Jul 28, 2018
Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 10 m2 using paper (k = 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate voltage of 5000 V? (e0 = 8.85  10-12 C2/Nm2)
 a. 4.1 J
  c. 0.41 J
  b. 8200 J
  d. 82,000 J

Question 2

Starting from rest, a wheel undergoes constant angular acceleration for a period of time T. At what time after the start of rotation does the wheel reach an angular speed equal to its average angular speed for this interval?
 a. 0.25T
  c. 0.67T
  b. 0.50T
  d. 0.71T


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31809pancho

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

A

Answer to Question 2

B


dejastew

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Reply 2 on: Jul 28, 2018
Excellent

marict

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Reply 3 on: Yesterday
Wow, this really help

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