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Two very long parallel wires cary 2 amps each in the opposite directions. The centers of...

Two very long parallel wires cary 2 amps each in the opposite directions. The centers of the wires are .3 meters apart from each other. What is the magnitude of the magnetic field halfway be-tween the two wires?

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Answer #1

Answer: The magnetic field due to a long straight wire carrying current I is given by

The current in the wires is flowing in opposite directions. Therefore magnetic field halfway between the two wires is

Or

Given I = 2 amps; r = 3/2 = 1.5 m

Also, we know that

Therefore,

= (4 × 10^(-7)×2) / 1.5

   = 5.33 × (10^-7) Tesla

= ANSWER

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