Physics
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A thin circular loop of wire of radius 3R carries a current I in the clockwise direction. Determine the magnetic field strength at the center of the loop.
μ0⋅I3R\frac{\mu_0\cdot I}{3R}3Rμ0⋅I
μ0⋅I6R\frac{\mu_0\cdot I}{6R}6Rμ0⋅I
2μ0⋅I3R\frac{2\mu_0\cdot I}{3R}3R2μ0⋅I
μ0⋅IR\frac{\mu_0\cdot I}{R}Rμ0⋅I