096 Export PDF A sheet of copper is pulled at constant velocity v from a region

Question

096 Export PDF A sheet of copper is pulled at constant velocity v from a region that contains a uniform magnetic field. At the instant shown in the figure, the sheet is partially in and partially out of the field. The induced emf in the sheet leads to the eddy current shown. Which one of the following statements concerning the direction of the magnetic field is true? Region containing magnetic field eddy current O A The magnetic field points to the right. O B The magnetic field points out of the paper. The magnetic field points to the left. O D The magnetic field points into the paper O E The direction of the magnetic field cannot be determined from the information given

Explanation / Answer

In the given case, the magnetic flux with loop into screen is decreasing as it move away from field. The induced current try to reduce the change by producing the field in the same direction as the external field.

As the eddy current move anticlockwise, the magnetic field point out of the page.

Correct option is (B)

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