A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is

A proton and helium necleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is

An electron and a proton enter a magnetic field at right angles to the field with the same kinetic energy

An electron and a proton enter a magnetic field at right angles to the field with the same kinetic energy

A proton and an alpha- particle enter a uniform magnetic field at right angles to the field with same speed. The ratio of the periods of alpha- particle and proton is

An electron and a proton enter region of uniform magnetic field in a direction at right angles to the field with the same kinetic energy. They describe circular paths of radius r_(e) and r_(p) respectively. Then

An electron and a proton enter region of uniform magnetic field in a direction at right angles to the field with the same kinetic energy. They describe circular paths of radius r_(e) and r_(p) respectively. Then

An electron of mass m_e and a proton of mass m_p are injected into a uniform magnetic field at right angles to the direction of the field, with equal velocity. The ratio of the radii of their orbits r_e//r_p is equal to

An alpha - particle and a proton moving with the same kinetic energy enter a region of uniform magnetic field at right angles to the field . The ratio of the radii of the paths of alpha - particle to that of the proton is