Answer to Question 3

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Two parallel wires, X and Y, of length 0.8 m have currents 3.0 A and 5.0 A flowing through them respectively.  The two wires are 5.0 cm apart.  Calculate the force between them.

F = (4p 10-7 H m-1 3.0 A 5.0 A 0.8 m) (2p 0.050 m)

 

F = 4.8 10-5 N