If the current density in a linear conductor of radius 'a' varies with r according to relation `J=kr^2`, where k is a constant and r is the distance of a point from the axis of conductor. Find the magnetic field induction at a point distance r from the axis, when (i) `rlta` and (ii) `rgta`.

Ampere's law provides us an easy way to calculate the magnetic field due to a symmetrical distribution of current. Its mathemfield expression is ointvecB.dl=mu_0I_("in") . The quantity on the left hand side is known as line as integral of magnetic field over a closed Ampere's loop. If the current density in a linear conductor of radius a varies with r according to relation J=kr^2 , where k is a constant and r is the distance of a point from the axis of conductor, find the magnetic field induction at a point distance r from the axis when rlta. Assume relative permeability of the conductor to be unity.

Ampere's law provides us an easy way to calculate the magnetic field due to a symmetrical distribution of current. Its mathemfield expression is ointvecB.dl=mu_0I_("in") . The quantity on the left hand side is known as line as integral of magnetic field over a closed Ampere's loop. If the current density in a linear conductor of radius a varies with r according to relation J=kr^2 , where k is a constant and r is the distance of a point from the axis of conductor, find the magnetic field induction at a point distance r from the axis when rlta. Assume relative permeability of the conductor to be unity.

Suppose that the current density in a wife of radius a varies with r according to J = Kr^(2) , where K is a constant and r is the distance from the axis of the wire. Find the megnetic field at a point distance r from the axis when (a) r a

Suppose that the current density in a wire of radius a varius with r according to Kr^2 where K is a constant and r is the distance from the axis of the wire. Find the magnetic field at a point at distance r form the axis when (a) rlta and (b) rgta.

Suppose that the current density in a wire of radius a varius with r according to Kr^2 where K is a constant and r is the distance from the axis of the wire. Find the magnetic field at a point at distance r form the axis when (a) r lt a and (b) r gt a.

The current density in a wire of radius a varies with radial distance r as J=(J_0r^2)/a , where J_0 is a constant. Choose the incorrect statement.

Let r be the distance of a point on the axis of a magnetic dipole from its centre. The magnetic field at such a point is proportional to