so that it can revolve in the path of same radius?

A particle of charge q and mass m moving with a velocity v along x−axis enters the region x>0 with uniform magnetic field B along the k ^ direction. The particle will penetrate in this region in the x−direction up to a distance d equal to A proton of mass m and charge +e is [...]

An electron and a proton enter region of uniform magnetic filed in a direction at right angles to the filed with the same kinetic energy. They describe circular paths of radius re and rp respectively. Then A proton of mass m and charge +e is moving in a circular orbit in a magnetic fielg with [...]

A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to the magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is A proton of mass m and [...]

A proton of mass m and charge +e is moving in a circular orbit in a magnetic fielg with energy 1 Me V. What should be the energy of alpha particle ( mass = 4 m and charge = + 2e ), so that it can revolve in the path of same radius? A proton [...]