etic needle with magnetic moment μ = 0.045 Am2 is placed in a uniform magnetic field B = 0.45 T as shown in the figure. The angle between the direction of the magnetic moment and the direction of the magnetic field is θ = 75°. 1. Ignore the mass of the needl
etic needle with magnetic moment μ = 0.045 Am2 is placed in a uniform magnetic field B = 0.45 T as shown in the figure. The angle between the direction of the magnetic moment and the direction of the magnetic field is θ = 75°. 1. Ignore the mass of the needl
ChapterA: Appendix
Section: Chapter Questions
Problem 8Q
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A magnetic needle with magnetic moment μ = 0.045 Am2 is placed in a uniform magnetic field B = 0.45 T as shown in the figure. The angle between the direction of the magnetic moment and the direction of the magnetic field is θ = 75°.
1. Ignore the mass of the needle, express the work needed to change the angle from θ to α in terms of μ, B, θ, α.
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