An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged paricle 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 particle carrying a charge q moves along the axis of the circular wire with speed v. What is the magnetic force experienced by the particle when it passes through the centre of the circle ?

Electric current i enters and leaves a square loop made of homogeneous wire of uniform cross-section through diagonally opposite corners.A charge particle q moving along the axis of the square loop.Passes through centre at speed v .The magnetic force acting on the particle when it passes through the centre has a magnitude

A particle is moving in a horizontal circular motion of radius R with constant speed v, then the angular momentum of particle about the axis passing through centre is....

An electric current is flowing in a circular wire of radius a. At what distance from the centre on the axis of the circular wire will the magnetic field be 1/8th of its value at the centre?

A moving charged particle q travelling along the positive X-axis enters a uniform magnetic field B. When will the force acting on q be maximum?

If a charged particle having charge q is moving in a circular path of radius R with a uniform speed u, what would be the magnetic field at the centre?

The magnetic field line passing through the centre of a current-carrying circular ring is