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 February 11th, 2018, 12:31 AM #1 Newbie   Joined: Feb 2018 From: Afghanistan Posts: 17 Thanks: 0 Magnetic field Last edited by skipjack; February 11th, 2018 at 01:26 AM.
 February 11th, 2018, 06:44 PM #2 Senior Member     Joined: Jul 2012 From: DFW Area Posts: 614 Thanks: 83 Math Focus: Electrical Engineering Applications Can you use Ampere's Law and the example given here to solve this? Hint: Normalize the magnetic fields produced by wire 1 and wire 2 at point O to 1 and note their directions. Add the vectors for the resultant magnitude $(\sqrt{2})$ and direction. Then determine the magnitude and direction of the current of wire 3 to cancel the resultant, keeping in mind the distance $(\sqrt{2} \ \text{m})$ from wire 3 to point O.

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