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Author Question: A very long straight wire carries a 12-A current eastward and a second very long straight wire ... (Read 161 times)

CQXA

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on: Jul 29, 2018
A very long straight wire carries a 12-A current eastward and a second very long straight wire carries a 14-A current westward. The wires are parallel to each other and are 42 cm apart. Calculate the force on a 6.4 m length of one of the wires.
 
  (0 = 4  10-7 T  m/A)
  A) 5.1  10-4 N
  B) 2.2  10-4 N
  C) 5.1  10-6 N
  D) 8.0  10-5 N
  E) 8.0  10-7 N

Question 2

What is the minimum magnitude of an electric field that balances the weight of a plastic sphere of mass 6.4 g that has been charged to -3.0 nC?
 
  A) 2.1  107 N/C
  B) 2.4  106 N/C
  C) 4.5  106 N/C
  D) 6.4  106 N/C


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jgranad15

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

A

Answer to Question 2

A


CQXA

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Reply 2 on: Jul 29, 2018
Gracias!

kjohnson

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Reply 3 on: Yesterday
Wow, this really help

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