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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 6 - Magnetic Force, Moment and Torque > An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through its centre at speed v. The magnetic force acting on the particle when it passes through the centre has a magnitude.

An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through its centre at speed v. The magnetic force acting on the particle when it passes through the centre has a magnitude.

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