360609
A magnet of length \(2\,L\) and moment '\(M\)' is axially cut into two equal halves '\(P\)' and '\(Q\)'. The piece '\(P\)' is bent in the form of semi circle and '\(Q\)' is attached to it as shown. Its moment is
360610
An iron bar of length \({L}\) has magnetic moment \({M}\). It is bent at the middle of its length such that the two arms make an angle \({60^{\circ}}\) with each other. The magnetic moment of this new magnet is :
360611
Assertion : Magnetic moment of helium atom is zero. Reason : All the electrons are paired in helium atom orbitals.
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.
Explanation:
In a helium atom (as inert gas), all the electrons are paired in orbitals, and their electron spins are opposite, leading to the cancellation of magnetic moments. The net magnetic moment of a helium atom is zero. So correct option is (1).
PHXII05:MAGNETISM and MATTER
360612
Assertion : The magnetism of magnet is due to the spin motion of electrons Reason : Dipole moment of electron is smaller than that due to orbit motion around nucleus.
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.
Explanation:
The magnetism of a material is primarily due to the behavior of its electrons, specifically their intrinsic magnetic moments associated with their spin. When electrons spin on their axes, they generate magnetic dipole moments. The collective alignment of these dipole moments in a material is what gives rise to its magnetism. In reality, the magnetic dipole moment associated with the spin of an electron is significantly greater than the dipole moment resulting from its orbital motion around the nucleus. The spin magnetic moment is an intrinsic property of electrons and is responsible for the majority of the magnetism in materials. The magnetic moment due to orbital motion is usually much smaller in comparison. So, while the assertion is correct, the reason provided incorrectly states that the dipole moment due to orbit motion is smaller than that due to the spin motion, which is not the case. Therefore, the correct answer is (3) Assertion is correct but Reason is incorrect.
360609
A magnet of length \(2\,L\) and moment '\(M\)' is axially cut into two equal halves '\(P\)' and '\(Q\)'. The piece '\(P\)' is bent in the form of semi circle and '\(Q\)' is attached to it as shown. Its moment is
360610
An iron bar of length \({L}\) has magnetic moment \({M}\). It is bent at the middle of its length such that the two arms make an angle \({60^{\circ}}\) with each other. The magnetic moment of this new magnet is :
360611
Assertion : Magnetic moment of helium atom is zero. Reason : All the electrons are paired in helium atom orbitals.
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.
Explanation:
In a helium atom (as inert gas), all the electrons are paired in orbitals, and their electron spins are opposite, leading to the cancellation of magnetic moments. The net magnetic moment of a helium atom is zero. So correct option is (1).
PHXII05:MAGNETISM and MATTER
360612
Assertion : The magnetism of magnet is due to the spin motion of electrons Reason : Dipole moment of electron is smaller than that due to orbit motion around nucleus.
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.
Explanation:
The magnetism of a material is primarily due to the behavior of its electrons, specifically their intrinsic magnetic moments associated with their spin. When electrons spin on their axes, they generate magnetic dipole moments. The collective alignment of these dipole moments in a material is what gives rise to its magnetism. In reality, the magnetic dipole moment associated with the spin of an electron is significantly greater than the dipole moment resulting from its orbital motion around the nucleus. The spin magnetic moment is an intrinsic property of electrons and is responsible for the majority of the magnetism in materials. The magnetic moment due to orbital motion is usually much smaller in comparison. So, while the assertion is correct, the reason provided incorrectly states that the dipole moment due to orbit motion is smaller than that due to the spin motion, which is not the case. Therefore, the correct answer is (3) Assertion is correct but Reason is incorrect.
360609
A magnet of length \(2\,L\) and moment '\(M\)' is axially cut into two equal halves '\(P\)' and '\(Q\)'. The piece '\(P\)' is bent in the form of semi circle and '\(Q\)' is attached to it as shown. Its moment is
360610
An iron bar of length \({L}\) has magnetic moment \({M}\). It is bent at the middle of its length such that the two arms make an angle \({60^{\circ}}\) with each other. The magnetic moment of this new magnet is :
360611
Assertion : Magnetic moment of helium atom is zero. Reason : All the electrons are paired in helium atom orbitals.
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.
Explanation:
In a helium atom (as inert gas), all the electrons are paired in orbitals, and their electron spins are opposite, leading to the cancellation of magnetic moments. The net magnetic moment of a helium atom is zero. So correct option is (1).
PHXII05:MAGNETISM and MATTER
360612
Assertion : The magnetism of magnet is due to the spin motion of electrons Reason : Dipole moment of electron is smaller than that due to orbit motion around nucleus.
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.
Explanation:
The magnetism of a material is primarily due to the behavior of its electrons, specifically their intrinsic magnetic moments associated with their spin. When electrons spin on their axes, they generate magnetic dipole moments. The collective alignment of these dipole moments in a material is what gives rise to its magnetism. In reality, the magnetic dipole moment associated with the spin of an electron is significantly greater than the dipole moment resulting from its orbital motion around the nucleus. The spin magnetic moment is an intrinsic property of electrons and is responsible for the majority of the magnetism in materials. The magnetic moment due to orbital motion is usually much smaller in comparison. So, while the assertion is correct, the reason provided incorrectly states that the dipole moment due to orbit motion is smaller than that due to the spin motion, which is not the case. Therefore, the correct answer is (3) Assertion is correct but Reason is incorrect.
360609
A magnet of length \(2\,L\) and moment '\(M\)' is axially cut into two equal halves '\(P\)' and '\(Q\)'. The piece '\(P\)' is bent in the form of semi circle and '\(Q\)' is attached to it as shown. Its moment is
360610
An iron bar of length \({L}\) has magnetic moment \({M}\). It is bent at the middle of its length such that the two arms make an angle \({60^{\circ}}\) with each other. The magnetic moment of this new magnet is :
360611
Assertion : Magnetic moment of helium atom is zero. Reason : All the electrons are paired in helium atom orbitals.
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.
Explanation:
In a helium atom (as inert gas), all the electrons are paired in orbitals, and their electron spins are opposite, leading to the cancellation of magnetic moments. The net magnetic moment of a helium atom is zero. So correct option is (1).
PHXII05:MAGNETISM and MATTER
360612
Assertion : The magnetism of magnet is due to the spin motion of electrons Reason : Dipole moment of electron is smaller than that due to orbit motion around nucleus.
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.
Explanation:
The magnetism of a material is primarily due to the behavior of its electrons, specifically their intrinsic magnetic moments associated with their spin. When electrons spin on their axes, they generate magnetic dipole moments. The collective alignment of these dipole moments in a material is what gives rise to its magnetism. In reality, the magnetic dipole moment associated with the spin of an electron is significantly greater than the dipole moment resulting from its orbital motion around the nucleus. The spin magnetic moment is an intrinsic property of electrons and is responsible for the majority of the magnetism in materials. The magnetic moment due to orbital motion is usually much smaller in comparison. So, while the assertion is correct, the reason provided incorrectly states that the dipole moment due to orbit motion is smaller than that due to the spin motion, which is not the case. Therefore, the correct answer is (3) Assertion is correct but Reason is incorrect.
