153904
Magnetic moment of revolving electron of charge ' $e$ ' and mass ' $m$ ' in terms of angular momentum ' $L$ ' of electron is
1 $\frac{\mathrm{eL}}{2 \mathrm{~m}}$
2 $\frac{2 \mathrm{~mL}}{\mathrm{e}^{2}}$
3 $\frac{\mathrm{e}}{2 \mathrm{~mL}}$
4 $\frac{2 \mathrm{~mL}}{\mathrm{e}}$
Explanation:
A Magnetic moment of revolving of charge ' $\mathrm{e}$ ' and mass ' $\mathrm{m}$ ' in terms of angular momentum $\mathrm{L}$ of electron is $\frac{\mathrm{eL}}{2 \mathrm{~m}}$.
MHT-CET 2020
Moving Charges & Magnetism
153918
A circular current loop of magnetic moment $M$ is in a arbitrary orientation in an external uniform magnetic field $B$. The work done to rotate the loop by $3^{\circ}$ about an axis perpendicular to its plane is :
1 $\mathrm{MB}$
2 $\sqrt{3} \frac{\mathrm{MB}}{2}$
3 $\frac{\mathrm{MB}}{2}$
4 Zero
Explanation:
D Even though the coil is rotated about an axis perpendicular to its plane, the potential energy does not change. Hence, work done is zero.
Karnataka CET-2019
Moving Charges & Magnetism
153931
A bar magnet of magnetic moment $M$, is placed in a magnetic field of induction $B$. The torque exerted on it is
C The torque is defined as the cross product of magnetic moment $(\mathrm{M})$ and magnetic field(B). $\tau=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$
VITEEE-2017
Moving Charges & Magnetism
153933
Identify the wrong statement.
1 Current loop is equivalent to a magnetic dipole
2 Magnetic dipole moment of a planar loop of area A carrying current is $I^{2} \mathrm{~A}$
3 Particles like proton, electron carry an intrinsic magnetic moment
4 The current loop (magnetic moment $\mathrm{m}$ ) placed in a uniform magnetic field, $\mathrm{B}$ experiences a torque $\tau=\mathrm{m} \times \mathrm{B}$
5 Ampere's circuital law is not independent of Biot Savart's law
Explanation:
B Magnetic dipole moment of planar loop of area A carrying current is $\mathrm{I}^{2} \mathrm{~A}$, because magnetic dipole moment of planner loop is IA.
153904
Magnetic moment of revolving electron of charge ' $e$ ' and mass ' $m$ ' in terms of angular momentum ' $L$ ' of electron is
1 $\frac{\mathrm{eL}}{2 \mathrm{~m}}$
2 $\frac{2 \mathrm{~mL}}{\mathrm{e}^{2}}$
3 $\frac{\mathrm{e}}{2 \mathrm{~mL}}$
4 $\frac{2 \mathrm{~mL}}{\mathrm{e}}$
Explanation:
A Magnetic moment of revolving of charge ' $\mathrm{e}$ ' and mass ' $\mathrm{m}$ ' in terms of angular momentum $\mathrm{L}$ of electron is $\frac{\mathrm{eL}}{2 \mathrm{~m}}$.
MHT-CET 2020
Moving Charges & Magnetism
153918
A circular current loop of magnetic moment $M$ is in a arbitrary orientation in an external uniform magnetic field $B$. The work done to rotate the loop by $3^{\circ}$ about an axis perpendicular to its plane is :
1 $\mathrm{MB}$
2 $\sqrt{3} \frac{\mathrm{MB}}{2}$
3 $\frac{\mathrm{MB}}{2}$
4 Zero
Explanation:
D Even though the coil is rotated about an axis perpendicular to its plane, the potential energy does not change. Hence, work done is zero.
Karnataka CET-2019
Moving Charges & Magnetism
153931
A bar magnet of magnetic moment $M$, is placed in a magnetic field of induction $B$. The torque exerted on it is
C The torque is defined as the cross product of magnetic moment $(\mathrm{M})$ and magnetic field(B). $\tau=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$
VITEEE-2017
Moving Charges & Magnetism
153933
Identify the wrong statement.
1 Current loop is equivalent to a magnetic dipole
2 Magnetic dipole moment of a planar loop of area A carrying current is $I^{2} \mathrm{~A}$
3 Particles like proton, electron carry an intrinsic magnetic moment
4 The current loop (magnetic moment $\mathrm{m}$ ) placed in a uniform magnetic field, $\mathrm{B}$ experiences a torque $\tau=\mathrm{m} \times \mathrm{B}$
5 Ampere's circuital law is not independent of Biot Savart's law
Explanation:
B Magnetic dipole moment of planar loop of area A carrying current is $\mathrm{I}^{2} \mathrm{~A}$, because magnetic dipole moment of planner loop is IA.
153904
Magnetic moment of revolving electron of charge ' $e$ ' and mass ' $m$ ' in terms of angular momentum ' $L$ ' of electron is
1 $\frac{\mathrm{eL}}{2 \mathrm{~m}}$
2 $\frac{2 \mathrm{~mL}}{\mathrm{e}^{2}}$
3 $\frac{\mathrm{e}}{2 \mathrm{~mL}}$
4 $\frac{2 \mathrm{~mL}}{\mathrm{e}}$
Explanation:
A Magnetic moment of revolving of charge ' $\mathrm{e}$ ' and mass ' $\mathrm{m}$ ' in terms of angular momentum $\mathrm{L}$ of electron is $\frac{\mathrm{eL}}{2 \mathrm{~m}}$.
MHT-CET 2020
Moving Charges & Magnetism
153918
A circular current loop of magnetic moment $M$ is in a arbitrary orientation in an external uniform magnetic field $B$. The work done to rotate the loop by $3^{\circ}$ about an axis perpendicular to its plane is :
1 $\mathrm{MB}$
2 $\sqrt{3} \frac{\mathrm{MB}}{2}$
3 $\frac{\mathrm{MB}}{2}$
4 Zero
Explanation:
D Even though the coil is rotated about an axis perpendicular to its plane, the potential energy does not change. Hence, work done is zero.
Karnataka CET-2019
Moving Charges & Magnetism
153931
A bar magnet of magnetic moment $M$, is placed in a magnetic field of induction $B$. The torque exerted on it is
C The torque is defined as the cross product of magnetic moment $(\mathrm{M})$ and magnetic field(B). $\tau=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$
VITEEE-2017
Moving Charges & Magnetism
153933
Identify the wrong statement.
1 Current loop is equivalent to a magnetic dipole
2 Magnetic dipole moment of a planar loop of area A carrying current is $I^{2} \mathrm{~A}$
3 Particles like proton, electron carry an intrinsic magnetic moment
4 The current loop (magnetic moment $\mathrm{m}$ ) placed in a uniform magnetic field, $\mathrm{B}$ experiences a torque $\tau=\mathrm{m} \times \mathrm{B}$
5 Ampere's circuital law is not independent of Biot Savart's law
Explanation:
B Magnetic dipole moment of planar loop of area A carrying current is $\mathrm{I}^{2} \mathrm{~A}$, because magnetic dipole moment of planner loop is IA.
153904
Magnetic moment of revolving electron of charge ' $e$ ' and mass ' $m$ ' in terms of angular momentum ' $L$ ' of electron is
1 $\frac{\mathrm{eL}}{2 \mathrm{~m}}$
2 $\frac{2 \mathrm{~mL}}{\mathrm{e}^{2}}$
3 $\frac{\mathrm{e}}{2 \mathrm{~mL}}$
4 $\frac{2 \mathrm{~mL}}{\mathrm{e}}$
Explanation:
A Magnetic moment of revolving of charge ' $\mathrm{e}$ ' and mass ' $\mathrm{m}$ ' in terms of angular momentum $\mathrm{L}$ of electron is $\frac{\mathrm{eL}}{2 \mathrm{~m}}$.
MHT-CET 2020
Moving Charges & Magnetism
153918
A circular current loop of magnetic moment $M$ is in a arbitrary orientation in an external uniform magnetic field $B$. The work done to rotate the loop by $3^{\circ}$ about an axis perpendicular to its plane is :
1 $\mathrm{MB}$
2 $\sqrt{3} \frac{\mathrm{MB}}{2}$
3 $\frac{\mathrm{MB}}{2}$
4 Zero
Explanation:
D Even though the coil is rotated about an axis perpendicular to its plane, the potential energy does not change. Hence, work done is zero.
Karnataka CET-2019
Moving Charges & Magnetism
153931
A bar magnet of magnetic moment $M$, is placed in a magnetic field of induction $B$. The torque exerted on it is
C The torque is defined as the cross product of magnetic moment $(\mathrm{M})$ and magnetic field(B). $\tau=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}$
VITEEE-2017
Moving Charges & Magnetism
153933
Identify the wrong statement.
1 Current loop is equivalent to a magnetic dipole
2 Magnetic dipole moment of a planar loop of area A carrying current is $I^{2} \mathrm{~A}$
3 Particles like proton, electron carry an intrinsic magnetic moment
4 The current loop (magnetic moment $\mathrm{m}$ ) placed in a uniform magnetic field, $\mathrm{B}$ experiences a torque $\tau=\mathrm{m} \times \mathrm{B}$
5 Ampere's circuital law is not independent of Biot Savart's law
Explanation:
B Magnetic dipole moment of planar loop of area A carrying current is $\mathrm{I}^{2} \mathrm{~A}$, because magnetic dipole moment of planner loop is IA.
