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+{{tag>magnetostatic magnetic_field_lines exam_ee2_SS2024}}{{include_n>1030}}
+#@TaskTitle_HTML@##@Lvl_HTML@#~~#@ee1_taskctr#~~ Magnetic Field Lines \\
+<fs medium>(written test, approx. 6 % of a 120-minute written test, SS2024)</fs> #@TaskText_HTML@#
+The following setup shall be given:
+  * Four conductors are located perpendicular to the plane of the diagram
+  * All of them conduct a current with the same magnitude, but not in the same direction.
+  * A permanent magnet is located in between the conductors.
+{{drawio>ee2:8a117vmnbbmsbfz3_question1.svg}}
+. Do not consider the permanent magnet at first. Draw at least 10 field lines of the H-field qualitatively.
+Give a a correct representation of their direction, and density for the shown area.
+#@HiddenBegin_HTML~8a117vmnbbmsbfz3_12,Result~@#
+{{drawio>ee2:8a117vmnbbmsbfz3_answer1.svg}}
+#@HiddenEnd_HTML~8a117vmnbbmsbfz3_12,Result~@#
+. Discuss how the permanent magnet affects the H-field, based on the fundamental definition of the H-field.
+#@HiddenBegin_HTML~8a117vmnbbmsbfz3_22,Result~@#
+  * The H-field is defined by currents $\sum I = \int H {\rm d}s$ .
+  * In the permanent magnet, there are no free currents.
+  * The bound currents (of the permanent magnet) create also an H field.
+  * This exits on the north pole and enters the magnet on the south pole (similar to the B-field)_
+  * $H = B/\mu$
+  * The H-field from task 1 gets distracted
+{{drawio>ee2:8a117vmnbbmsbfz3_answer2.svg}}
+#@HiddenEnd_HTML~8a117vmnbbmsbfz3_22,Result~@#
+#@TaskEnd_HTML@#

magnetostatic magnetic field lines exam ee2 ss2024