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At what distance from a long straight wire carrying a current of 12 A will the magnetic field be equal to 3 × 10-6 Wb/m2?
(a) 5 × 10-2 m
(b) 12 × 10-2 m
(c) 18 × 10-2 m
(d) 24 × 10-2 m
(a)
Current (I) = 12 A and magnetic field (B)
= 3 × 10-5 Wb/m2.
Consider magnetic field at distance r.
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