Magnetic flux density at a distance of 5x10-2 m from a straight conductor carrying a current 5 amp is [ ]
(A) 2x10−4 T (B) 2x10−9 T (C) 2x10−7 T (D) 2πx10−7 T
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which class maths l donot tell you these que because l am in 7 claass
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