Question

a magnetic pole of bar magnet with pole strength of 100Am is 20cm away from the centre of a bar magnet .bar magnet has pole strength of 200Am and has a length 5cm .if a magnetic pole is on the axis of a bar magnet ,find the force on the magnetic pole​

Answer 1

Your answer is 3000 cm.

Answer 2

Force on the magnetic field is 0.00121 N.

Explanation:

given,

                Pole strength of the bar magnet  $q_{1}$ = 100 Am

                Pole strength of another bar magnet  $q_{2}$ = 200 Am

               Distance between the the two bar magnets = 20 cm

We know that the force between the bar magnets are,

           

                                      ⇒ F = μ$\frac{q_{2}q_{1}}{4\pi r^{2} }$

                                      ⇒ F = $\frac{4 \times\pi \times 100 \times 200}{4\times\pi\times 0.20^{2} }$

                                       ⇒ F = 0.00121 N

Bar magnets are those magnets that have two magnetic poles of opposite fields called north and south.