Torque & Magnetic Dipole
PHXII04:MOVING CHARGES AND MAGNETISM

363032 An electron (\(e\)) is revolving in a circular orbit of radius \(r\) in hydrogen atom. The angular momentum of the electron is (\(M=\) magnetic dipole moment associated with it and \(m=\) mass of electron)

1 \(\dfrac{m M}{e}\)
2 \(\dfrac{3 M m}{e}\)
3 \(\dfrac{2 m M}{e}\)
4 \(\dfrac{4 m M}{e}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363033 The gyro - magnetic ratio of an electron in an \(H\)-atom according to Bohr model is
(i) Independent of which orbit it is in
(ii) Negative
(iii) Positive
(iv) Increases with the quantum number ' \(n\) '.

1 (i), (ii)
2 (ii), (iii)
3 (i), (ii), (iv)
4 (i), (iv)
PHXII04:MOVING CHARGES AND MAGNETISM

363034 A straight conductor of mass \(m\) and carrying a current \('i'\) is hinged at one end and placed in a plane perpendicular to the magnetic field of intensity \(B\) as shown in the figure. At any moment if the conductor is left free, then the angular acceleration of the conductor will be (Assume gravity free region)
supporting img

1 \(\frac{{3i}}{{3mB}}\)
2 \(\frac{{3iB}}{{2\;m}}\)
3 \(\frac{{3iB}}{{3\;m}}\)
4 \(\frac{{3B}}{{2m}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363035 Assertion :
A rectangular current loop is in an arbitrary orientation in an extenal uniform magnetic field. No work is required to rotate the loop about an axis perpendicular to its plane.
Reason :
All positions represent the same level of energy.

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.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII04:MOVING CHARGES AND MAGNETISM

363032 An electron (\(e\)) is revolving in a circular orbit of radius \(r\) in hydrogen atom. The angular momentum of the electron is (\(M=\) magnetic dipole moment associated with it and \(m=\) mass of electron)

1 \(\dfrac{m M}{e}\)
2 \(\dfrac{3 M m}{e}\)
3 \(\dfrac{2 m M}{e}\)
4 \(\dfrac{4 m M}{e}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363033 The gyro - magnetic ratio of an electron in an \(H\)-atom according to Bohr model is
(i) Independent of which orbit it is in
(ii) Negative
(iii) Positive
(iv) Increases with the quantum number ' \(n\) '.

1 (i), (ii)
2 (ii), (iii)
3 (i), (ii), (iv)
4 (i), (iv)
PHXII04:MOVING CHARGES AND MAGNETISM

363034 A straight conductor of mass \(m\) and carrying a current \('i'\) is hinged at one end and placed in a plane perpendicular to the magnetic field of intensity \(B\) as shown in the figure. At any moment if the conductor is left free, then the angular acceleration of the conductor will be (Assume gravity free region)
supporting img

1 \(\frac{{3i}}{{3mB}}\)
2 \(\frac{{3iB}}{{2\;m}}\)
3 \(\frac{{3iB}}{{3\;m}}\)
4 \(\frac{{3B}}{{2m}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363035 Assertion :
A rectangular current loop is in an arbitrary orientation in an extenal uniform magnetic field. No work is required to rotate the loop about an axis perpendicular to its plane.
Reason :
All positions represent the same level of energy.

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.
PHXII04:MOVING CHARGES AND MAGNETISM

363032 An electron (\(e\)) is revolving in a circular orbit of radius \(r\) in hydrogen atom. The angular momentum of the electron is (\(M=\) magnetic dipole moment associated with it and \(m=\) mass of electron)

1 \(\dfrac{m M}{e}\)
2 \(\dfrac{3 M m}{e}\)
3 \(\dfrac{2 m M}{e}\)
4 \(\dfrac{4 m M}{e}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363033 The gyro - magnetic ratio of an electron in an \(H\)-atom according to Bohr model is
(i) Independent of which orbit it is in
(ii) Negative
(iii) Positive
(iv) Increases with the quantum number ' \(n\) '.

1 (i), (ii)
2 (ii), (iii)
3 (i), (ii), (iv)
4 (i), (iv)
PHXII04:MOVING CHARGES AND MAGNETISM

363034 A straight conductor of mass \(m\) and carrying a current \('i'\) is hinged at one end and placed in a plane perpendicular to the magnetic field of intensity \(B\) as shown in the figure. At any moment if the conductor is left free, then the angular acceleration of the conductor will be (Assume gravity free region)
supporting img

1 \(\frac{{3i}}{{3mB}}\)
2 \(\frac{{3iB}}{{2\;m}}\)
3 \(\frac{{3iB}}{{3\;m}}\)
4 \(\frac{{3B}}{{2m}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363035 Assertion :
A rectangular current loop is in an arbitrary orientation in an extenal uniform magnetic field. No work is required to rotate the loop about an axis perpendicular to its plane.
Reason :
All positions represent the same level of energy.

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.
PHXII04:MOVING CHARGES AND MAGNETISM

363032 An electron (\(e\)) is revolving in a circular orbit of radius \(r\) in hydrogen atom. The angular momentum of the electron is (\(M=\) magnetic dipole moment associated with it and \(m=\) mass of electron)

1 \(\dfrac{m M}{e}\)
2 \(\dfrac{3 M m}{e}\)
3 \(\dfrac{2 m M}{e}\)
4 \(\dfrac{4 m M}{e}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363033 The gyro - magnetic ratio of an electron in an \(H\)-atom according to Bohr model is
(i) Independent of which orbit it is in
(ii) Negative
(iii) Positive
(iv) Increases with the quantum number ' \(n\) '.

1 (i), (ii)
2 (ii), (iii)
3 (i), (ii), (iv)
4 (i), (iv)
PHXII04:MOVING CHARGES AND MAGNETISM

363034 A straight conductor of mass \(m\) and carrying a current \('i'\) is hinged at one end and placed in a plane perpendicular to the magnetic field of intensity \(B\) as shown in the figure. At any moment if the conductor is left free, then the angular acceleration of the conductor will be (Assume gravity free region)
supporting img

1 \(\frac{{3i}}{{3mB}}\)
2 \(\frac{{3iB}}{{2\;m}}\)
3 \(\frac{{3iB}}{{3\;m}}\)
4 \(\frac{{3B}}{{2m}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

363035 Assertion :
A rectangular current loop is in an arbitrary orientation in an extenal uniform magnetic field. No work is required to rotate the loop about an axis perpendicular to its plane.
Reason :
All positions represent the same level of energy.

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.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here