Essay
Force on parallel wires: As shown in the figure, a rectangular current loop is carrying current = 3.0 A, in the direction shown, and is located near a long wire carrying a current
. The long wire is parallel to the sides of the rectangle. The rectangle loop has length 0.80 m and its sides are 0.10 m and 0.70 m from the wire, as shown. We measure that the net force on the rectangular loop is
and is directed towards the wire.
(a) What is the magnitude of the current Iw?
(b) In which direction does Iw flow: from top to bottom or from bottom to top in the sketch?
Correct Answer:

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(a) 1.2 A ...View Answer
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