The xz plane contains an infinite sheet of current in the positive z direction. The current per

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The xz plane contains an infinite sheet of current in the positive z direction. The current per unit length (along the x direction) is ?. Figure(a) shows a point P above the sheet (y > 0) and two portions of the current sheet labeled I1 and I2.

(a) What is the direction of the magnetic field B at P due to the two portions of the current shown?

(b) What is the direction of the magnetic field B at P due to the entire sheet?

(c) What is the direction of B at a point below the sheet (y (d) Apply Ampere's law to the rectangular curve shown in Figure(b) to show that the magnetic field at any point above the sheet is given by B = ½?0?i.

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