Consider an electron microscope shooting electron electrons at 0.5c towards a ta

Question

Consider an electron microscope shooting electron electrons at 0.5c towards a target. The microscope is in an external magnetic field of 2.4*10^-4 T that is creating problems for this lab. Consequently it is necessary to produce a magnetic field outside the microscope, in order to cancel this interfering field. In the picture the beam goes down (-z direction). The x direction is straight out of the screen towards you. The external field is in that direction.

The lab considers installing a wire that will carry a large enough current to make a magnetic field that cancels the interfering field at the target. Which way would it be possible for the field of the wire to cancel the interfering field.

A: along the x-axis

B: Along the Z-axis

C:along the z or y axis ,but not the x axis.

Explanation / Answer

Of course. If you have a magnet and move it around you are manipulating the magnetic field. If you have an electromagnet you can vary the current to vary (manipulate) the field.

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