Current I flows in a coil of area A with N turns. What is the magnetic moment M of the coil?
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Current I flows in a coil of area A with N turns. What is the magnetic moment M of the coil?

G1 Physics · Accepted Answer

Step 1: Magnetic moment of a single current loop is m = IA. Step 2: With N identical tightly wound turns, the moments add. Step 3: M = NIA. Final answer: (A) NIA.