A Flat Circular Loop of Wire Is in a Uniform $0.30 \mathrm {~T}$

question 158

Multiple Choice

A flat circular loop of wire is in a uniform magnetic field of $0.30 \mathrm {~T}$ . The diameter of the loop is $1.0$ $\mathrm { m }$ , and a 2.0-A current flows in it. What is the magnitude of the magnetic torque on the loop when the plane of the loop is parallel to the magnetic field?

• A) \(0.00 \mathrm {~N} \cdot \mathrm { m }\)
• B) \(0.47 \mathrm {~N} \cdot \mathrm { m }\)
• C) \(0.52 \mathrm {~N} \cdot \mathrm { m }\)
• D) \(0.41 \mathrm {~N} \cdot \mathrm { m }\)

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