What will be the magnetic field at a point on the axis of a long solenoid containing 10 turns per cm length, when a current of 1 ampere flows through it ?

What is the magnetic field at a point placed outside of a long solenoid carrying current I.

Find an expression for the magnetic field at a point on the axis of a circular current loop.

Find an expression for the magnetic field at points on the axis of a circular current loop.

Using Ampere's circuital law, find the magnetic flux density at the centre of a long solenoid carrying current.

Calculate the electric field at a point on the axial line of a dipole at 20 cm from the centre. The dipole is made of +- 10mu C charges separated by 1 cm.

An infinitely long straight current carrying wire produces a magnetic field B at a point at a distance 'a' from it. What must be the radius of the circular loop, so that for the same current through it the magnetic field at (II) an axial point, distant equal to the radius of the loop equals B?

An infinitely long straight current carrying wire produces a magnetic field B at a point at a distance 'a' from it. What must be the radius of the circular loop, so that for the same current through it the magnetic field at (i) its dentre equals B/2

Calculate the magnetic field due to a circular coil of 100 turns, radius 30 cm, carrying a current of 10 A, (i) at the centre and (ii) at a point 40 cm away from the centre on its axis.