Question

An electron moves along +x direction. It enters into a region of uniform magnetic field. `vecB` directed along –z direction as shown in fig. Draw the shape of the trajectory followed by the electron after entering the field.

Answer 1

Force on the electron is given by

`vec"F" = -"q"(vec"v" xx vec"B")`

So, the electron will follow a semi-circular path in the magnetic field.