Current Attempt in Progress A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.30 m. The normal to the plane of the loop is parallel to a constant magnetic field (p = 0) of magnitude 0.77 T. What is the change AO in the magnetic flux that passes through the loop when, starting with the position shown in the drawing, the semicircle is rotated through half a revolution? B (into paper) ΔΦ = i

Four thin wires that are parallel, straight, and very long are shown in the figure. All four wires carry an identical current I in the directions indicated. All four wires are a distance d from the origin of the coordinate system. 04 d All wires carry a current I in the d d X- indicated direction. 1 3 d All wires are a distance d from the origin. O2 Identify the direction of the magnetic field at the origin for each wire. Possible directions have been given below. Each answer choice may be used more than once. B. I | |E. A. T В. С. > D. + E. out of page F. into page Wire 1: Wire 2: Wire 3: Wire 4:

A circular loop of wire has radius R = 0.0314m and carries a clockwise current of 8.00A. Whare are the magnitude and direction of the magnetic field of the coil at its center (point P in the sketch). I know the answer is 1.60 * 10^-4 T into page I don't understand how you know the answer is into page and not out of page.

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