A charged particle of `1.6 xx 10^- 19` coulomb moves with a velocity of `1.6 xx 10^6 `m/s perpendicular to a uniform magnetic field of induction 300 Tesla. Find the magnitude of the force on it.

A proton which carries a charge of 1.6 xx 10^-19C moving with a velocity of 2 xx 10^9ms^-1 along the direction of a uniform magnetic field of 250 T. Calculate the force acting on the proton.

An electron (of mass = 9.1xx 10^31 kg and charge= 1.6xx 10^-19 coul) moving with velocity V=106 m/s enters into a magnetic field region and is found to describe a circle of radius 10 cm. The magnetic field induction in Tesla is