A Flat Rectangular Loop of Wire Carrying A $4.0$ -A Current Is Placed in a Uniform

question 4

Multiple Choice

A flat rectangular loop of wire carrying a $4.0$ -A current is placed in a uniform $0.60 - T$ magnetic field. The magnitude of the torque acting on this loop when the plane of the loop makes a $30 ^ { \circ }$ angle with the field is measured to be $1.1 \mathrm {~N} \cdot \mathrm { m }$ . What is the area of this loop?

• A) \(0.40 \mathrm {~m} ^ { 2 }\)
• B) \(0.80 \mathrm {~m} ^ { 2 }\)
• C) \(0.53 \mathrm {~m} ^ { 2 }\)
• D) \(0.26 \mathrm {~m} ^ { 2 }\)
• E) \(0.20 \mathrm {~m} ^ { 2 }\)

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