A 45-M Long Wire Is Coiled So That It Makes

question 42

Multiple Choice

A 45-m long wire is coiled so that it makes a coil containing 100 circular loops, one on top of the other.If the wire carries a current of 13 A, what is the magnetic dipole moment of the coil?

• A)21 A·m²
• B)6.7 A·m²
• C)3.3 A·m²
• D)2.6 A·m²
• E)1.2 A·m²

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