A Circular,20-Turn Coil Has a Radius of 5 $\times$ 10^-2 a · M²
D)0

Multiple Choice

A circular,20-turn coil has a radius of 5.0 cm.What is the magnitude of the magnetic moment of the coil when it carries a current of 2.5 A?

A) 1.5 A · m²
B) 0.16 A · m²
C) 2.0 $\times$ 10^-2 A · m²
D) 0.39 A · m²
E) 3.9 kA · m²