A Flat Rectangular Loop of Wire Is Placed Between the Poles

question 119

Multiple Choice

A flat rectangular loop of wire is placed between the poles of a magnet,as shown in the figure.It has dimensions w = 0.60 m and L = 1.0 m,and carries a current I = 2.0 A in the direction shown.The $\vec { B }$ field due to the magnet is uniform and of magnitude 0.80 T.The loop rotates in the magnetic field and at one point the plane of the loop is parallel to the field.At that instant,what is the magnitude of the torque exerted on the wire by the magnetic field?

• A)0.00 N ∙ m
• B)0.40 N ∙ m
• C)0.48 N ∙ m
• D)0.83 N ∙ m
• E)0.96 N ∙ m

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Definitions:

Multiplicities

In NMR spectroscopy, refers to the splitting of a resonance into multiple peaks due to spin-spin coupling.

Proton Spin Decoupled

A technique in NMR spectroscopy used to simplify spectra by removing the interactions between proton spins.

Singlets

In spectroscopy, a single peak or line that represents a non-split energy level.

DEPT-90

A nuclear magnetic resonance (NMR) technique that distinguishes between CH and CH3 groups in a molecule.