The magnitude of velocites of two `alpha`-particle A and b, entering a uniform magnetic field perpendicularly, are in the ratio 6:1. On entering the field, they move along circular paths. Find the ratio of the radii of their paths.

A proton and an alpha -particle enter a uniform magnetic field perpendicularly with the same speed. How many times if the time period of alpha -particle than that of proton? Deduce the expression for the ratio of the radii of the circular paths of two particles.

Find the ratio of radii of the circles covered by a proton and alpha particles when both enter same uniform magnetic field perpendicularly with same kinetic energy.

What will be the path of a charged particle moving along the direction of a uniform magnetic field?

What will be the path of a charged particle moving perpendicular to a uniform magnetic field ?

A charged particle enters a uniform magnetic field experience an upward force as indicated in the figure. What is the charge sign on this particle?

A particle with charge q moving with a velocity v in the plane of the paper enters a uniform magnetc field B, acting perpendicular to the plane of the paper. Deduce an expression for the tie period of the charge, as it moves in a circular path in the field. Why does the kinetic energy of the charge not change, while moving in the magnetic field?

An electron having mass m, charge q and kinetic energy E enters a uniform magnetic field B perpendicularly. Then its frequency of rotation will be

A proton and an electron travelling along parallel patha enters a region of uniform magnetic field, acting perpendicular to their paths. Which of them will move in a circular path with higher frequency.