Dipole in a Magnetic Field
PHXII05:MAGNETISM and MATTER

360387 The mid points of two small magnetic dipoles of length \(d\) in end-on positions, are separated by a distance \(x,(x>>d)\). The force between them is proportional to \({x^{ - n}}\) where \(n\) is :
supporting img

1 2
2 1
3 4
4 3
PHXII05:MAGNETISM and MATTER

360388 Statement A :
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance.
Statement B :
The magnetic forces between two poles do not follow inverse square law of distance.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII05:MAGNETISM and MATTER

360389 Two identical bar magnets with a length 10\(cm\) and weight 50\(gm\)-weight are arranged freely with their like poles facing in an inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3\(mm\). Pole strength of the poles of each magnet will be
supporting img

1 2 \(amp.m\)
2 6.64 \(amp.m\)
3 10.25 \(amp.m\)
4 None of these
PHXII05:MAGNETISM and MATTER

360390 Two equal magnetic poles placed \(5\,cm\) in air attract each other with a force of \({14.4 \times 10^{-4} {~N}}\). How far from each other should they be placed so that the force of attraction will be \({1.6 \times 10^{-4} {~N}}\) ?

1 \(0.15\,m\)
2 \(0.29\,m\)
3 \(0.45\,m\)
4 \(0.35\,m\)
PHXII05:MAGNETISM and MATTER

360391 Two small magnets each of magnetic moment \(10\;A - {m^2}\) are placed in end on position \(0.1\;m\) apart from their centres. The force acting between them is

1 \(0.6 \times {10^7}\;N\)
2 \(0.06 \times {10^7}\;N\)
3 \(0.6\;N\)
4 \(0.06\;N\)
PHXII05:MAGNETISM and MATTER

360387 The mid points of two small magnetic dipoles of length \(d\) in end-on positions, are separated by a distance \(x,(x>>d)\). The force between them is proportional to \({x^{ - n}}\) where \(n\) is :
supporting img

1 2
2 1
3 4
4 3
PHXII05:MAGNETISM and MATTER

360388 Statement A :
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance.
Statement B :
The magnetic forces between two poles do not follow inverse square law of distance.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII05:MAGNETISM and MATTER

360389 Two identical bar magnets with a length 10\(cm\) and weight 50\(gm\)-weight are arranged freely with their like poles facing in an inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3\(mm\). Pole strength of the poles of each magnet will be
supporting img

1 2 \(amp.m\)
2 6.64 \(amp.m\)
3 10.25 \(amp.m\)
4 None of these
PHXII05:MAGNETISM and MATTER

360390 Two equal magnetic poles placed \(5\,cm\) in air attract each other with a force of \({14.4 \times 10^{-4} {~N}}\). How far from each other should they be placed so that the force of attraction will be \({1.6 \times 10^{-4} {~N}}\) ?

1 \(0.15\,m\)
2 \(0.29\,m\)
3 \(0.45\,m\)
4 \(0.35\,m\)
PHXII05:MAGNETISM and MATTER

360391 Two small magnets each of magnetic moment \(10\;A - {m^2}\) are placed in end on position \(0.1\;m\) apart from their centres. The force acting between them is

1 \(0.6 \times {10^7}\;N\)
2 \(0.06 \times {10^7}\;N\)
3 \(0.6\;N\)
4 \(0.06\;N\)
PHXII05:MAGNETISM and MATTER

360387 The mid points of two small magnetic dipoles of length \(d\) in end-on positions, are separated by a distance \(x,(x>>d)\). The force between them is proportional to \({x^{ - n}}\) where \(n\) is :
supporting img

1 2
2 1
3 4
4 3
PHXII05:MAGNETISM and MATTER

360388 Statement A :
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance.
Statement B :
The magnetic forces between two poles do not follow inverse square law of distance.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII05:MAGNETISM and MATTER

360389 Two identical bar magnets with a length 10\(cm\) and weight 50\(gm\)-weight are arranged freely with their like poles facing in an inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3\(mm\). Pole strength of the poles of each magnet will be
supporting img

1 2 \(amp.m\)
2 6.64 \(amp.m\)
3 10.25 \(amp.m\)
4 None of these
PHXII05:MAGNETISM and MATTER

360390 Two equal magnetic poles placed \(5\,cm\) in air attract each other with a force of \({14.4 \times 10^{-4} {~N}}\). How far from each other should they be placed so that the force of attraction will be \({1.6 \times 10^{-4} {~N}}\) ?

1 \(0.15\,m\)
2 \(0.29\,m\)
3 \(0.45\,m\)
4 \(0.35\,m\)
PHXII05:MAGNETISM and MATTER

360391 Two small magnets each of magnetic moment \(10\;A - {m^2}\) are placed in end on position \(0.1\;m\) apart from their centres. The force acting between them is

1 \(0.6 \times {10^7}\;N\)
2 \(0.06 \times {10^7}\;N\)
3 \(0.6\;N\)
4 \(0.06\;N\)
PHXII05:MAGNETISM and MATTER

360387 The mid points of two small magnetic dipoles of length \(d\) in end-on positions, are separated by a distance \(x,(x>>d)\). The force between them is proportional to \({x^{ - n}}\) where \(n\) is :
supporting img

1 2
2 1
3 4
4 3
PHXII05:MAGNETISM and MATTER

360388 Statement A :
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance.
Statement B :
The magnetic forces between two poles do not follow inverse square law of distance.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII05:MAGNETISM and MATTER

360389 Two identical bar magnets with a length 10\(cm\) and weight 50\(gm\)-weight are arranged freely with their like poles facing in an inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3\(mm\). Pole strength of the poles of each magnet will be
supporting img

1 2 \(amp.m\)
2 6.64 \(amp.m\)
3 10.25 \(amp.m\)
4 None of these
PHXII05:MAGNETISM and MATTER

360390 Two equal magnetic poles placed \(5\,cm\) in air attract each other with a force of \({14.4 \times 10^{-4} {~N}}\). How far from each other should they be placed so that the force of attraction will be \({1.6 \times 10^{-4} {~N}}\) ?

1 \(0.15\,m\)
2 \(0.29\,m\)
3 \(0.45\,m\)
4 \(0.35\,m\)
PHXII05:MAGNETISM and MATTER

360391 Two small magnets each of magnetic moment \(10\;A - {m^2}\) are placed in end on position \(0.1\;m\) apart from their centres. The force acting between them is

1 \(0.6 \times {10^7}\;N\)
2 \(0.06 \times {10^7}\;N\)
3 \(0.6\;N\)
4 \(0.06\;N\)
PHXII05:MAGNETISM and MATTER

360387 The mid points of two small magnetic dipoles of length \(d\) in end-on positions, are separated by a distance \(x,(x>>d)\). The force between them is proportional to \({x^{ - n}}\) where \(n\) is :
supporting img

1 2
2 1
3 4
4 3
PHXII05:MAGNETISM and MATTER

360388 Statement A :
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance.
Statement B :
The magnetic forces between two poles do not follow inverse square law of distance.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXII05:MAGNETISM and MATTER

360389 Two identical bar magnets with a length 10\(cm\) and weight 50\(gm\)-weight are arranged freely with their like poles facing in an inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3\(mm\). Pole strength of the poles of each magnet will be
supporting img

1 2 \(amp.m\)
2 6.64 \(amp.m\)
3 10.25 \(amp.m\)
4 None of these
PHXII05:MAGNETISM and MATTER

360390 Two equal magnetic poles placed \(5\,cm\) in air attract each other with a force of \({14.4 \times 10^{-4} {~N}}\). How far from each other should they be placed so that the force of attraction will be \({1.6 \times 10^{-4} {~N}}\) ?

1 \(0.15\,m\)
2 \(0.29\,m\)
3 \(0.45\,m\)
4 \(0.35\,m\)
PHXII05:MAGNETISM and MATTER

360391 Two small magnets each of magnetic moment \(10\;A - {m^2}\) are placed in end on position \(0.1\;m\) apart from their centres. The force acting between them is

1 \(0.6 \times {10^7}\;N\)
2 \(0.06 \times {10^7}\;N\)
3 \(0.6\;N\)
4 \(0.06\;N\)