A very long straight wire carries a 12-A current eastward and a ...

[CQXA]

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

[jgranad15]

Answer to Question 1

A

Answer to Question 2

A

[CQXA]

TYSM

[Jsherida]

Excellent