# jee

## Magnetc field due to toroid using Ampere’s circuital Law

A toroid is an endless ring shaped solenoid.Consider a toroid having n turns per unit length through which current i is flowing [ figure given below]. Magnetic field is set up inside the turns of the toroid. The magnetic lines of force inside the toroid are concentric circles. From symmetry, the magnetic field at all …

## Magnetic Field due to a Straiight Solenoid using Ampere’s Circuital Law

A solenoid consists of an insulated long wire closely wound in the form of a helix, whose length is very long in comparison to its diameter. Let us consider a long straight solenoid having n turns per unit length and carrying current i. The magnetic field in the solenoid when current passes through it is …

## Magnetic Field due to infinite long carrying current straight wire using Ampere’s Circuital Law

Consider a circular wire of radius a and of infinite length. A steady current I is flowing through it. A magnetic field is produced around it due to flowing current. The magnetic field lines are concentric circles with their centres on the axis of the wire [Figure given below]. Case I. Magnetic field intensity at …

## Ampere’s Circuitial Law

Ampere circuital law states that the line integral of magnetic field around any closed path in vacuum is equal to absolute permeability times the total current enclosed by the path.Mathematically, where is the magnetic field, is the small element, is the absolute permeability of vacuum and I is the current. denotes integral around closed path. …

## Magnetic field due to a current carrying circular loop

Let us consider a circular coil of radius a with centre O and the plane of the coil is perpendicular to the plane of the paper [Fig. 3.1.13]. Current i flows through the coil in the direction as shown in the figure. Let P be a point on the axis of the circular coil at …

## Magnetic field due to infinitely long current carrying straight wire

Let us consider a long straight conductor XY in the plane of the paper carrying current i in the direction X to Y [Figure given below]. Also let P be a point at a perpendicular distance a from the wire XY. A small current element of the straight wire is taken at O. Let be …