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

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) $5.2 \mathrm {~N} \cdot \mathrm { m }$