Question

# Two short bar magnets of magnetic moments 0.125Am2 and 0.512Am2 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

A
0.13m
B
0.2m
C
0.26m
D
0.1m
Solution
Verified by Toppr

#### Baxial=μ02M4πr3Equating the magnetic fields due to the two bar magnets, M1x3=M2(d−x)3Solving the above for x (distance from the center of weaker magnet to the neutral point), gives the formula in the hint. Putting in the values, we get, x=0.1m

0
Similar Questions
Q1

A small bar magnet is placed with its north pole facing magnetic north pole of earth. The neutral points are located at distance r from its centre. If the magent is rotated by 180, netural point shall be obtained at distance

View Solution
Q2

A short bar magnet is placed with its south pole towards geographical north. The neutral points are situated at a distance of 20cm from the centre of the magnet. If BH=0.3×104Wb/m2 then the magnetic moment of the magnet is : View Solution
Q3

Two short bar magnets have their magnetic moments 1.2Am2 and 1.0Am2. They are placed on a horizontal table parallel to each other at a distance of 20 cm between their centres, such that their north poles pointing towards geographic south. They have common magnetic equatorial line. Horizontal component of earth's magnetic field is 3.6×105 T. Then, the resultant horizontal magnetic induction at mid point of the line joining their centers is :
(μo4π=107H/m)

View Solution
Q4

Two short bar magnets with magnetic moments 400 abAcm2 and 800 abAcm2 are placed with their axis in the same straight line with similar poles facing each other and with their centres at 20 cm apart from each other. Then the force of repulsion is:

Disclaimer: No option as 0.08 dyne was given in the original paper.

View Solution
Q5

Two short bar magnets of length 1 cm each have magnetic moments 1.20Am2 and 1.00Am2 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 separated by a distance of 20.0cm. 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 earth's magnetic induction is 3.6×105Wb/m2)

View Solution
Solve
Guides