Current I A flowing in a circular coil of radius r. then the magnetic induction at the centre is B. If the current is doubled then the magnetic induction will be

Current 'i' is flowing in heaxagonal coil of side a. The magnetic induction at the centre of the coil will be

The magnetic field at the centre of the current carrying coil is

In the figure shown, the magnetic induction at the centre of the arc due to the current in portion AB will be

Due to the flow of current in a circular loop of radius R , the magnetic induction produced at the centre of the loop is B . The magnetic moment of the loop is ( mu_(0) =permeability constant)

The magnetic induction at the point O, if the wire carries a current I, is

If the current flowing in a circular loop is in clockwise directions, then the magnetic induction will be

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is

A wire is bent in the form of a circular arc of radius r with a straight portion AB. If the current in the wire is i , then the magnetic induction at point O is

An electron having kinetic energy K is moving i a circular orbit of radius R perpendicular to a uniform magnetic induction. If kinetic energy is douled and magnetic induction tripled, the radius will become

The current I ampere is flowing in an equilateral triangle of side a the magnetic field induction at the centroid will be