An electron is not deflected in passing through a certain region of space.can we be sure that there is no magnetic field in that region.

Answer the following questions: A certain region of space is to be shielded from magnetic fields. Suggest a method.

A magnetic field can be produced by

In a certain arrangement a proton does not get deflected while passing through a magnetic field region. Under what conditions in this possible?

An electron beam with equivalent electric current I enters a region of crossed electric field and magnetic field B. Both the fields are uniform. It is found that the electron beam goes undeviated through the region of fields. After passing the field region, electrons hit a grounded target. How much force is exerted by the electron beam on urget? Assumem is the mass of electron and e its charge.