A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field $\overset{ˉ}{B}$ . The work done to rotate the loop by 30 about an axis perpendicular to its plane is:

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Answer 1

The rotation of the loop by $30 °$ about an axis perpendicular to its plane make no change in the angle made by axis of the loop with the direction of magnetic field, therefore, the work done to rotate the loop is zero.
Important point: The work done to rotate the loop the loop in magnetic field $W = M B (c o s θ_{1} - c o s θ_{2})$ , where signs are as usual.

Answer 2

The rotation of the loop by

30 °

about an axis perpendicular to its plane make no change in the angle made by axis of the loop with the direction of magnetic field, therefore, the work done to rotate the loop is zero.

Important point: The work done to rotate the loop the loop in magnetic field

W = M B (c o s θ_{1} - c o s θ_{2})

, where signs are as usual.

A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field $\overset{ˉ}{B}$ . The work done to rotate the loop by 30 about an axis perpendicular to its plane is:

$M B$

$3 \frac{M B}{2}$

$\frac{M B}{2}$

$z e r o$

An electron of charge $e$ and mass $m$ is moving in a circular loop of radius $r$ with a uniform angular speed $ω$ . Then which of the following statements are correct?

An electron is projected along the axis of a circular conductor carrying a current. the force experienced by the electron will be

Write the expression for the equivalent magnetic moment of a planer current loop of area $A$ . having $N$ turns and carrying a current $i$ . Use the expression to find the magnetic dipole moment of a revolving electron.

Revise with Concepts

Dipole in Uniform Magnetic Field

Solve Question on Magnetic Dipoles

A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field Bˉ. The work done to rotate the loop by 30 about an axis perpendicular to its plane is:

MB

3​2MB​

2MB​

zero

An electron of charge e and mass m is moving in a circular loop of radius r with a uniform angular speed ω. Then which of the following statements are correct?

An electron is projected along the axis of a circular conductor carrying a current. the force experienced by the electron will be

Write the expression for the equivalent magnetic moment of a planer current loop of area A. having N turns and carrying a current i. Use the expression to find the magnetic dipole moment of a revolving electron.

Revise with Concepts

Dipole in Uniform Magnetic Field

Solve Question on Magnetic Dipoles

A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field $\overset{ˉ}{B}$ . The work done to rotate the loop by 30 about an axis perpendicular to its plane is:

$M B$

$3 \frac{M B}{2}$

$\frac{M B}{2}$

$z e r o$

An electron of charge $e$ and mass $m$ is moving in a circular loop of radius $r$ with a uniform angular speed $ω$ . Then which of the following statements are correct?

Write the expression for the equivalent magnetic moment of a planer current loop of area $A$ . having $N$ turns and carrying a current $i$ . Use the expression to find the magnetic dipole moment of a revolving electron.