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A solenoid of length 0.5m has 500 turns. If 2A current flows, calculate the magnetic field strength (take μ₀ = 4π x 10^-7 T m/A).

A4π x 10^-4 T

B8π x 10^-4 T

C2π x 10^-4 T

D1.25 x 10^-3 T