Home
Class 12
PHYSICS
Two short bar magnets with magnetic mome...

Two short bar magnets with magnetic moments `400 ab– "A cm"^2 and 800 ab – A cm^2` are placed with their axis in the same straight line with similar poles facing each other and with their centres at 20 cm from each other. Then the force of repulsion is

A

12 dyne

B

6 dyne

C

800 dyne

D

150 dyne

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Two short bar magnets with magnetic moments 8Am^(2) and 27Am^(2) are placed 35cm apart along their common axial line with their like poles facing each other. The neutral point is

Two short bar magnets of magnetic moments 0.1245 Am^(2) and 0.512 Am^(2) are placed with their like poles facing each other. If the distance between the centres of the magnet is 0.26m . The distance of neutral point from the weaker magnet is

Two bar magnets of magnetic moments 12Am^(2) and 10Am^(2) are placed one over the other .First with their similar poles in contact after unlike poles in contact.The ratio of their resultant magnetic moments is

A short bar magnet has a magnetic moment of 10 Am^(2) .If its length is 10 cm,then the pole strength of the dipole is

A bar magnet of magnetic moment of 5*0Am^2 has poles 20cm apart. Calculate the pole strength.

Two short bar magnets of length 1cm each have magnetic moments 1.20 Am^(2) and 1.00 Am^(2) respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the south. They have a common magnetic equator and are separted by a distance of 20.0 cm . The value of the resultant horizontal magnetic induction at the mid - point O of the line joining their centres is close to (Horizontal component of earths magnetic induction is 3.6 xx 10.5 Wh//m^(2)

The pole strength of a bar magnet of magnetic moment 5 Am^(2) and geometric length 6 cm is

Two short magnets placed along the same axis with their like poles facing each other repel each other with a force which varies inversely as

A short bar magnet of magnetic moment 1.2Am^(2) is placed in the magnetic meridian with its south pole pointing the north. If a neutral point is found at a distance of 20cm from the centre of the magnet, the value of the horizontal component of the earth's magnetic field is