A Flat Circular Coil Has 200 Identical Loops of Very $0.12 \mathrm {~m} ^ { 2 }$

question 32

Multiple Choice

A flat circular coil has 200 identical loops of very thin wire. Each loop has an area of $0.12 \mathrm {~m} ^ { 2 }$ and carries $0.50 \mathrm {~A}$ of current. This coil is placed in a magnetic field of $0.050 \mathrm {~T}$ oriented at $30 ^ { \circ }$ to the plane of the loop. What is the magnitude of the magnetic torque on the coil?

• A) \(2.5 \mathrm {~N} \cdot \mathrm { m }\)
• B) \(0.25 \mathrm {~N} \cdot \mathrm { m }\)
• C) \(0.52 \mathrm {~N} \cdot \mathrm { m }\)
• D) \(5.2 \mathrm {~N} \cdot \mathrm { m }\)

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