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Author Question: A cylindrical capacitor is made of two concentric cylinders. The inner cylinder has radius r1 = 4 ... (Read 109 times)

iveyjurea

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on: Jul 29, 2018
A cylindrical capacitor is made of two concentric cylinders. The inner cylinder has radius r1 = 4 mm, and the outer one a radius r2 = 8 mm. The common length of the cylinders is L = 150 m.
 
  What is the potential energy stored in this capacitor when a potential difference V = 4 V is applied between the inner and outer cylinder? A)
 
  9.6  10-8 J
  B)
 
  1.3  10-8 J
  C)
 
  6.3  10-8 J
  D)
 
  0.34  10-8 J
  E)
 
  4.6  10-8 J

Question 2

Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end.
 
  Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater temperature increase?
  A)
 
  the O2
  B)
 
  the He
  C)
 
  Neither; both will show the same increase.
  D)
 
  It's impossible to tell from the information given.


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raenoj

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


iveyjurea

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Reply #2 on: Jul 29, 2018
Thank you!


raenoj

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Reply #3 on: Jul 29, 2018
Always glad to help...


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