Magnetisation and Magnetic Intensity
PHXII05:MAGNETISM and MATTER

360526 The dipole moment of each molecule of a paramagnetic gas is \({1.5 \times 10^{-23} {amp} \times {m}^{2}}\). The temperature of gas is \({27^{\circ} {C}}\) and the number of molecules per unit volume in it is \({2 \times 10^{26} {~m}^{-3}}\). The maximum possible intensity of magnetisation in the gas will be

1 \({3 \times 10^{3} {amp} / {m}}\)
2 \({4 \times 10^{-3} {amp} / {m}}\)
3 \({5 \times 10^{5} {amp} / {m}}\)
4 \({6 \times 10^{-4} {amp} / {m}}\)
PHXII05:MAGNETISM and MATTER

360527 The magnetic field (\(B\)) inside a long solenoid having \(n\) turns per unit length and carrying current \(I\) when iron core is kept in it is ( \(\mu_{0}=\) permeability of vaccum, \(\chi=\) magnetic susceptibility)

1 \(\mu_{0} n I(1-\chi)\)
2 \(\mu_{0} n I \chi\)
3 \(\mu_{0} n I^{2}(1+\chi)\)
4 \(\mu_{0} n I(1+\chi)\)
PHXII05:MAGNETISM and MATTER

360528 The magnetization of bar magnet of length 5\(cm\), cross sectional area \(2\;c{m^2}\) and net magnetic moment \(1A{m^2}\) is

1 \(3 \times {10^5}\;A/m\)
2 \(4 \times {10^5}\;A/m\)
3 \(2 \times {10^5}\;A/m\)
4 \(1 \times {10^5}\;A/m\)
PHXII05:MAGNETISM and MATTER

360529 Each atom of an iron bar \({(5 {~cm} \times 1 {~cm} \times 1 {~cm})}\) has a magnetic moment of \({1.8 \times 10^{-23} {Am}^{2}}\). Knowing that the density of iron is \({7.78 \times 10^{3} {~kg}^{-3} {~m}}\), atomic weight is 56 , and Avogadro's number is \({6.02 \times 10^{23}}\), the magnetic moment of bar in the state of magnetic saturation will be

1 \(4.75\,A\,{m^2}\)
2 \(5.74\,A\,{m^2}\)
3 \(7.54\,A\,{m^2}\)
4 \(75.4\,A\,{m^2}\)
PHXII05:MAGNETISM and MATTER

360530 The intensity of magnetic field at a point \(X\) on the axis of a small magnet is equal to the field intensity at another point \(Y\) on its equatorial axis. The ratio of distance of \(X\) and \(Y\) from the centre of the magnet will be

1 \(2^{3}\)
2 \(2^{1 / 3}\)
3 \((2)^{-1 / 3}\)
4 \((2)^{-2}\)
PHXII05:MAGNETISM and MATTER

360526 The dipole moment of each molecule of a paramagnetic gas is \({1.5 \times 10^{-23} {amp} \times {m}^{2}}\). The temperature of gas is \({27^{\circ} {C}}\) and the number of molecules per unit volume in it is \({2 \times 10^{26} {~m}^{-3}}\). The maximum possible intensity of magnetisation in the gas will be

1 \({3 \times 10^{3} {amp} / {m}}\)
2 \({4 \times 10^{-3} {amp} / {m}}\)
3 \({5 \times 10^{5} {amp} / {m}}\)
4 \({6 \times 10^{-4} {amp} / {m}}\)
PHXII05:MAGNETISM and MATTER

360527 The magnetic field (\(B\)) inside a long solenoid having \(n\) turns per unit length and carrying current \(I\) when iron core is kept in it is ( \(\mu_{0}=\) permeability of vaccum, \(\chi=\) magnetic susceptibility)

1 \(\mu_{0} n I(1-\chi)\)
2 \(\mu_{0} n I \chi\)
3 \(\mu_{0} n I^{2}(1+\chi)\)
4 \(\mu_{0} n I(1+\chi)\)
PHXII05:MAGNETISM and MATTER

360528 The magnetization of bar magnet of length 5\(cm\), cross sectional area \(2\;c{m^2}\) and net magnetic moment \(1A{m^2}\) is

1 \(3 \times {10^5}\;A/m\)
2 \(4 \times {10^5}\;A/m\)
3 \(2 \times {10^5}\;A/m\)
4 \(1 \times {10^5}\;A/m\)
PHXII05:MAGNETISM and MATTER

360529 Each atom of an iron bar \({(5 {~cm} \times 1 {~cm} \times 1 {~cm})}\) has a magnetic moment of \({1.8 \times 10^{-23} {Am}^{2}}\). Knowing that the density of iron is \({7.78 \times 10^{3} {~kg}^{-3} {~m}}\), atomic weight is 56 , and Avogadro's number is \({6.02 \times 10^{23}}\), the magnetic moment of bar in the state of magnetic saturation will be

1 \(4.75\,A\,{m^2}\)
2 \(5.74\,A\,{m^2}\)
3 \(7.54\,A\,{m^2}\)
4 \(75.4\,A\,{m^2}\)
PHXII05:MAGNETISM and MATTER

360530 The intensity of magnetic field at a point \(X\) on the axis of a small magnet is equal to the field intensity at another point \(Y\) on its equatorial axis. The ratio of distance of \(X\) and \(Y\) from the centre of the magnet will be

1 \(2^{3}\)
2 \(2^{1 / 3}\)
3 \((2)^{-1 / 3}\)
4 \((2)^{-2}\)
PHXII05:MAGNETISM and MATTER

360526 The dipole moment of each molecule of a paramagnetic gas is \({1.5 \times 10^{-23} {amp} \times {m}^{2}}\). The temperature of gas is \({27^{\circ} {C}}\) and the number of molecules per unit volume in it is \({2 \times 10^{26} {~m}^{-3}}\). The maximum possible intensity of magnetisation in the gas will be

1 \({3 \times 10^{3} {amp} / {m}}\)
2 \({4 \times 10^{-3} {amp} / {m}}\)
3 \({5 \times 10^{5} {amp} / {m}}\)
4 \({6 \times 10^{-4} {amp} / {m}}\)
PHXII05:MAGNETISM and MATTER

360527 The magnetic field (\(B\)) inside a long solenoid having \(n\) turns per unit length and carrying current \(I\) when iron core is kept in it is ( \(\mu_{0}=\) permeability of vaccum, \(\chi=\) magnetic susceptibility)

1 \(\mu_{0} n I(1-\chi)\)
2 \(\mu_{0} n I \chi\)
3 \(\mu_{0} n I^{2}(1+\chi)\)
4 \(\mu_{0} n I(1+\chi)\)
PHXII05:MAGNETISM and MATTER

360528 The magnetization of bar magnet of length 5\(cm\), cross sectional area \(2\;c{m^2}\) and net magnetic moment \(1A{m^2}\) is

1 \(3 \times {10^5}\;A/m\)
2 \(4 \times {10^5}\;A/m\)
3 \(2 \times {10^5}\;A/m\)
4 \(1 \times {10^5}\;A/m\)
PHXII05:MAGNETISM and MATTER

360529 Each atom of an iron bar \({(5 {~cm} \times 1 {~cm} \times 1 {~cm})}\) has a magnetic moment of \({1.8 \times 10^{-23} {Am}^{2}}\). Knowing that the density of iron is \({7.78 \times 10^{3} {~kg}^{-3} {~m}}\), atomic weight is 56 , and Avogadro's number is \({6.02 \times 10^{23}}\), the magnetic moment of bar in the state of magnetic saturation will be

1 \(4.75\,A\,{m^2}\)
2 \(5.74\,A\,{m^2}\)
3 \(7.54\,A\,{m^2}\)
4 \(75.4\,A\,{m^2}\)
PHXII05:MAGNETISM and MATTER

360530 The intensity of magnetic field at a point \(X\) on the axis of a small magnet is equal to the field intensity at another point \(Y\) on its equatorial axis. The ratio of distance of \(X\) and \(Y\) from the centre of the magnet will be

1 \(2^{3}\)
2 \(2^{1 / 3}\)
3 \((2)^{-1 / 3}\)
4 \((2)^{-2}\)
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PHXII05:MAGNETISM and MATTER

360526 The dipole moment of each molecule of a paramagnetic gas is \({1.5 \times 10^{-23} {amp} \times {m}^{2}}\). The temperature of gas is \({27^{\circ} {C}}\) and the number of molecules per unit volume in it is \({2 \times 10^{26} {~m}^{-3}}\). The maximum possible intensity of magnetisation in the gas will be

1 \({3 \times 10^{3} {amp} / {m}}\)
2 \({4 \times 10^{-3} {amp} / {m}}\)
3 \({5 \times 10^{5} {amp} / {m}}\)
4 \({6 \times 10^{-4} {amp} / {m}}\)
PHXII05:MAGNETISM and MATTER

360527 The magnetic field (\(B\)) inside a long solenoid having \(n\) turns per unit length and carrying current \(I\) when iron core is kept in it is ( \(\mu_{0}=\) permeability of vaccum, \(\chi=\) magnetic susceptibility)

1 \(\mu_{0} n I(1-\chi)\)
2 \(\mu_{0} n I \chi\)
3 \(\mu_{0} n I^{2}(1+\chi)\)
4 \(\mu_{0} n I(1+\chi)\)
PHXII05:MAGNETISM and MATTER

360528 The magnetization of bar magnet of length 5\(cm\), cross sectional area \(2\;c{m^2}\) and net magnetic moment \(1A{m^2}\) is

1 \(3 \times {10^5}\;A/m\)
2 \(4 \times {10^5}\;A/m\)
3 \(2 \times {10^5}\;A/m\)
4 \(1 \times {10^5}\;A/m\)
PHXII05:MAGNETISM and MATTER

360529 Each atom of an iron bar \({(5 {~cm} \times 1 {~cm} \times 1 {~cm})}\) has a magnetic moment of \({1.8 \times 10^{-23} {Am}^{2}}\). Knowing that the density of iron is \({7.78 \times 10^{3} {~kg}^{-3} {~m}}\), atomic weight is 56 , and Avogadro's number is \({6.02 \times 10^{23}}\), the magnetic moment of bar in the state of magnetic saturation will be

1 \(4.75\,A\,{m^2}\)
2 \(5.74\,A\,{m^2}\)
3 \(7.54\,A\,{m^2}\)
4 \(75.4\,A\,{m^2}\)
PHXII05:MAGNETISM and MATTER

360530 The intensity of magnetic field at a point \(X\) on the axis of a small magnet is equal to the field intensity at another point \(Y\) on its equatorial axis. The ratio of distance of \(X\) and \(Y\) from the centre of the magnet will be

1 \(2^{3}\)
2 \(2^{1 / 3}\)
3 \((2)^{-1 / 3}\)
4 \((2)^{-2}\)
PHXII05:MAGNETISM and MATTER

360526 The dipole moment of each molecule of a paramagnetic gas is \({1.5 \times 10^{-23} {amp} \times {m}^{2}}\). The temperature of gas is \({27^{\circ} {C}}\) and the number of molecules per unit volume in it is \({2 \times 10^{26} {~m}^{-3}}\). The maximum possible intensity of magnetisation in the gas will be

1 \({3 \times 10^{3} {amp} / {m}}\)
2 \({4 \times 10^{-3} {amp} / {m}}\)
3 \({5 \times 10^{5} {amp} / {m}}\)
4 \({6 \times 10^{-4} {amp} / {m}}\)
PHXII05:MAGNETISM and MATTER

360527 The magnetic field (\(B\)) inside a long solenoid having \(n\) turns per unit length and carrying current \(I\) when iron core is kept in it is ( \(\mu_{0}=\) permeability of vaccum, \(\chi=\) magnetic susceptibility)

1 \(\mu_{0} n I(1-\chi)\)
2 \(\mu_{0} n I \chi\)
3 \(\mu_{0} n I^{2}(1+\chi)\)
4 \(\mu_{0} n I(1+\chi)\)
PHXII05:MAGNETISM and MATTER

360528 The magnetization of bar magnet of length 5\(cm\), cross sectional area \(2\;c{m^2}\) and net magnetic moment \(1A{m^2}\) is

1 \(3 \times {10^5}\;A/m\)
2 \(4 \times {10^5}\;A/m\)
3 \(2 \times {10^5}\;A/m\)
4 \(1 \times {10^5}\;A/m\)
PHXII05:MAGNETISM and MATTER

360529 Each atom of an iron bar \({(5 {~cm} \times 1 {~cm} \times 1 {~cm})}\) has a magnetic moment of \({1.8 \times 10^{-23} {Am}^{2}}\). Knowing that the density of iron is \({7.78 \times 10^{3} {~kg}^{-3} {~m}}\), atomic weight is 56 , and Avogadro's number is \({6.02 \times 10^{23}}\), the magnetic moment of bar in the state of magnetic saturation will be

1 \(4.75\,A\,{m^2}\)
2 \(5.74\,A\,{m^2}\)
3 \(7.54\,A\,{m^2}\)
4 \(75.4\,A\,{m^2}\)
PHXII05:MAGNETISM and MATTER

360530 The intensity of magnetic field at a point \(X\) on the axis of a small magnet is equal to the field intensity at another point \(Y\) on its equatorial axis. The ratio of distance of \(X\) and \(Y\) from the centre of the magnet will be

1 \(2^{3}\)
2 \(2^{1 / 3}\)
3 \((2)^{-1 / 3}\)
4 \((2)^{-2}\)