# Caution see the sketch to confirm the location of the

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2 . Caution: See the sketch to confirm the location of the point A. ˆ i ˆ j B A . Eval- uate the loop integral along the rectangular loop CDEFC , where EF = a and FC = b . What is the magnitude of this loop integral? Explanation: Consider that the current sheet consists of By symmetry, the direction of vector B due to an infinite current sheet is therefore along positive y direction (ˆ ) in the part of space where x < 0. 007(part2of3)10.0points Ampere’s Law states that contintegraldisplay vector B · dvectors = µ 0 I Denote the magnetic field at A by B A . Eval- uate the loop integral along the rectangular loop CDEFC , where EF = a and FC = b . What is the magnitude of this loop integral? 10.
an infinite number of current wires connected in parallel. We can easily determine the di- rection of vector B for one wire with right-hand rule. Then the direction of vector B for two wires set to- gether in parallel can be found (as illustrated below) by the superposition principle. Consider the path CDEFC .
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