Physics 108 Homework # 4
Magnetic Field FALL 2016 Name: TA: Day/Time: Section: 1. Consider the magnetic field sensor shown with three different magnetic field vectors. (1) (2) (3) a) Draw the vectors indicating the positive direction of the Axial and Radial field on the
magnetic sensor. Use your lab workbook as a reference. (1 pt)
b) For each magnetic field vector shown, identify the sign ( + or - ) of the axial and radial
components. (2 pts)
(1) Axial: Radial: (2) Axial: Radial: (3) Axial: Radial 2. Sketch the magnetic field lines, both inside and outside the magnet. (2 pts) N S 3. (a) Current travels clockwise through a loop. Sketch the direction of the magnetic field
around both sides of the loop (use (out of page), (into the page)). (2 pts) I (b) Two wires carry 3 A in opposite directions, as shown. Calculate the magnitude and
direction of the magnetic field at each point. (1) Point a: I = 3A • a I = 3A • b • c (2) Point b (directly between wires): 5m (3) Point c: 3m 2m

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