NEET Class neet Answered

Figure shows the arrangement of two bar magnets parallel to each other and their centers are aligned in vertical line .

In above figure, north pole of top magnet is pointing towards right and north pole of bottom magnet pointing towards left.

Let M be magnetic dipole mmoment of each bar magnet.

Net magnetic field is zero at center point between magnets along equatorial line as shown in figure

because at mid point magnetic field induction due to each bar magnet are equal in magnitude

but opposite in direction.

Similarly, if two bar magnets of equal magnetic dipole moment are placed placed along Horizontal line ,

then magnetic field induction will be zero at mid point between magnets . ( in this case , north pole of one magnet point towards top

and north pole of other magnet  is pointing towards bottom )

Hence net magnetic field induction at middle of all four magnets is zero.