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Author Question: Two uniformly distributed rings of charge, one of total charge Q1 and radius r1 and the other of ... (Read 181 times)

abern

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on: Jul 29, 2018
Two uniformly distributed rings of charge, one of total charge Q1 and radius r1 and the other of total charge Q2 and radius r2, have the same center. The potential at the center is
 
  What will be an ideal response?

Question 2

An object 4.0 cm in height is placed 8.0 cm in front of a concave mirror with a focal length of 10.0 cm. What is the position of its image in relation to the mirror and what are its characteristics?
 
  A)
 
  40.0 cm on the other side of mirror, real, 6.0 times bigger
  B)
 
  10.0 cm on the other side of mirror, virtual, 10.0 times bigger
  C)
 
  18.0 cm on the same side of mirror, virtual, 2.25 times bigger
  D)
 
  10.0 cm on the same side of mirror, real, 6.0 times bigger
  E)
 
  40.0 cm on the other side of mirror, virtual, 5.0 times bigger


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ghepp

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

Q1/4 O r1 + Q2/4 O r2.

Answer to Question 2

E


abern

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Reply 2 on: Jul 29, 2018
Gracias!

komodo7

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Reply 3 on: Yesterday
Wow, this really help

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