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A long straight wire carries a current of 35 A . What is the magnitude of the field B at a point 20 cm from the wire ? |
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Answer» SOLUTION :` I = 35 A, r =20 cm = 20 xx 10^(-2)`m `B = (mu_0I)/(2 pi r) = (4 pi xx 10^(-7) xx 35)/(2 pi xx 20 xx 10) = 3.5 xx 10^(-5) T` |
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