A 2.0 m long wire carries 5.0 A and is wound into 10 identical circular turns. Calculate the magnetic field at their common centre in μT. Take μ₀=4π×10⁻⁷ SI.

Question

G1 Physics · Accepted Answer

Each turn has radius r=L/(2πN)=2/(20π)=1/(10π) m. B=μ₀NI/(2r)=4π×10⁻⁷×10×5×10π/2=4.9348×10⁻⁴ T=493.48 μT.