If an `alpha-` particle moving with velocity 'v' enters perpendicular to a magnetic field then the magnetic force acting on it will be-

A charged particle is moving with velocity vecv in a uniform magnetic field vecB . The magnetic force acting on it will be maximum when _____ .

A proton, deutron and alpha particle are moving with same momentum in uniform magnetic field. The ratio of magnetic forces acting on them is___and their speed are in ratio____

If a particle of charge q is moving with a velocity v in a direction opposite to the magnetic field B, then the force acting on the particle is.

An electric charge q is moving with a velocity v in the direction parallel to the magnetic field B. The magnetic force acting on the charge is

A charged particle moves with velocity v in a uniform magnetic field vecB . The magnetic force experienced by the particle is

A proton and an alpha- particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the plane of their motion. The ratio of the radii of the circular paths descirbed by the proton and alpha -particle is

A proton an an alpha- particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the plane of their motion. The ratio of the radii of the circular paths descirbed by the proton and alpha -particle is

A proton an an alpha- particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the plane of their motion. The ratio of the radii of the circular paths descirbed by the proton and alpha -particle is