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A current of 2 amp. flows in a long, straight wire of radius `2 mm`. The intensity of magnetic field on the axis of the wire is

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A current of 2 amp. flows in a long, straight wire of radius `2 mm`. The intensity of magnetic field on the axis of the wire is
A. `((mu_(0))/(pi))xx10^(3)` Tesla
B. `((mu_(0))/(2pi))xx10^(3)` Tesla
C. `((2mu_(0))/(pi))xx10^(3)` Tesla
D. Zero
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Correct Answer - D
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