Question

calculation the magnetic field due to a bar magnet

Answer 1

$magnetic \: feild \: due \: to \: bar \: magnet \: is \: intesity \: of \: material \: \times current \div 2 \times radius$

Answer 2

Answer:

We can calculate the strength of magnetic field around any point in the bar magnet.The lines of magnetic field from a bar magnet form closed lines.

B = (Uo * m) / 4 * π * r²

It can be of 2 types that are :

1. At the end of pole along the axis
2. Broadside position

Explanation :

Magnetic Field around a Circular Wire :

If we take example of circular wire then we know that current flows both in and out of the circle.

Magnetic field around a circular wire is given by :

B = 2 * π * k . i/r

Magnetic Field around a Solenoid :

A solenoid behaves like a bar magnet and magnetic field is :

B = 4 * π * k * iN/l

Magnetic Field around a Wire :

Magnetic field around a wire is given by :

B = 2 * k . i/d