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PHXII05:MAGNETISM and MATTER

360588 The electron in a hydrogen atom is moving with a speed \(2.3 \times {10^6}\;m{\rm{/}}s\) in an orbit of radius \(0.5\,\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \). Calculate the magnetic moment of revolving electron:

1 \(9.75 \times {10^{ - 21}}\,{\rm{A}}{{\rm{m}}^2}\)
2 \(9.75 \times {10^{ - 20}}\,A{m^2}\)
3 \(9.24 \times {10^{ - 24}}{\mkern 1mu} A{m^2}\)
4 \(9 \times {10^{ - 24}}\,A{m^2}\)
PHXII05:MAGNETISM and MATTER

360589 A steel wire of length \(l\) has a magnetic moment \(M\). It is then bent into a semicircular arc. The new magnetic moment is

1 \(M \times l\)
2 \(\dfrac{M}{l}\)
3 \(\dfrac{2 M}{\pi}\)
4 \(M\)
PHXII05:MAGNETISM and MATTER

360590 Assertion :
The axis of the dipole does not coincide with the axis of rotation of the earth but is presently titled by approximately \(11^{\circ}\) with respect to the later.
Reason :
The magnetic poles are located where the magnetic field lines due to the dipole enter or leave the earth.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII05:MAGNETISM and MATTER

360591 The source of magnetic field among the following is:

1 Isolated magnetic pole
2 Static electric charge
3 Current carrying loop
4 Moving light source
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PHXII05:MAGNETISM and MATTER

360588 The electron in a hydrogen atom is moving with a speed \(2.3 \times {10^6}\;m{\rm{/}}s\) in an orbit of radius \(0.5\,\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \). Calculate the magnetic moment of revolving electron:

1 \(9.75 \times {10^{ - 21}}\,{\rm{A}}{{\rm{m}}^2}\)
2 \(9.75 \times {10^{ - 20}}\,A{m^2}\)
3 \(9.24 \times {10^{ - 24}}{\mkern 1mu} A{m^2}\)
4 \(9 \times {10^{ - 24}}\,A{m^2}\)
PHXII05:MAGNETISM and MATTER

360589 A steel wire of length \(l\) has a magnetic moment \(M\). It is then bent into a semicircular arc. The new magnetic moment is

1 \(M \times l\)
2 \(\dfrac{M}{l}\)
3 \(\dfrac{2 M}{\pi}\)
4 \(M\)
PHXII05:MAGNETISM and MATTER

360590 Assertion :
The axis of the dipole does not coincide with the axis of rotation of the earth but is presently titled by approximately \(11^{\circ}\) with respect to the later.
Reason :
The magnetic poles are located where the magnetic field lines due to the dipole enter or leave the earth.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII05:MAGNETISM and MATTER

360591 The source of magnetic field among the following is:

1 Isolated magnetic pole
2 Static electric charge
3 Current carrying loop
4 Moving light source
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PHXII05:MAGNETISM and MATTER

360588 The electron in a hydrogen atom is moving with a speed \(2.3 \times {10^6}\;m{\rm{/}}s\) in an orbit of radius \(0.5\,\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \). Calculate the magnetic moment of revolving electron:

1 \(9.75 \times {10^{ - 21}}\,{\rm{A}}{{\rm{m}}^2}\)
2 \(9.75 \times {10^{ - 20}}\,A{m^2}\)
3 \(9.24 \times {10^{ - 24}}{\mkern 1mu} A{m^2}\)
4 \(9 \times {10^{ - 24}}\,A{m^2}\)
PHXII05:MAGNETISM and MATTER

360589 A steel wire of length \(l\) has a magnetic moment \(M\). It is then bent into a semicircular arc. The new magnetic moment is

1 \(M \times l\)
2 \(\dfrac{M}{l}\)
3 \(\dfrac{2 M}{\pi}\)
4 \(M\)
PHXII05:MAGNETISM and MATTER

360590 Assertion :
The axis of the dipole does not coincide with the axis of rotation of the earth but is presently titled by approximately \(11^{\circ}\) with respect to the later.
Reason :
The magnetic poles are located where the magnetic field lines due to the dipole enter or leave the earth.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII05:MAGNETISM and MATTER

360591 The source of magnetic field among the following is:

1 Isolated magnetic pole
2 Static electric charge
3 Current carrying loop
4 Moving light source
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PHXII05:MAGNETISM and MATTER

360588 The electron in a hydrogen atom is moving with a speed \(2.3 \times {10^6}\;m{\rm{/}}s\) in an orbit of radius \(0.5\,\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \). Calculate the magnetic moment of revolving electron:

1 \(9.75 \times {10^{ - 21}}\,{\rm{A}}{{\rm{m}}^2}\)
2 \(9.75 \times {10^{ - 20}}\,A{m^2}\)
3 \(9.24 \times {10^{ - 24}}{\mkern 1mu} A{m^2}\)
4 \(9 \times {10^{ - 24}}\,A{m^2}\)
PHXII05:MAGNETISM and MATTER

360589 A steel wire of length \(l\) has a magnetic moment \(M\). It is then bent into a semicircular arc. The new magnetic moment is

1 \(M \times l\)
2 \(\dfrac{M}{l}\)
3 \(\dfrac{2 M}{\pi}\)
4 \(M\)
PHXII05:MAGNETISM and MATTER

360590 Assertion :
The axis of the dipole does not coincide with the axis of rotation of the earth but is presently titled by approximately \(11^{\circ}\) with respect to the later.
Reason :
The magnetic poles are located where the magnetic field lines due to the dipole enter or leave the earth.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII05:MAGNETISM and MATTER

360591 The source of magnetic field among the following is:

1 Isolated magnetic pole
2 Static electric charge
3 Current carrying loop
4 Moving light source
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