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Q175. The figure shows the cross-section of two long coaxial tubes carrying equal currents I in oppo
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Q175. The figure shows the cross-section of two long coaxial tubes carrying equal currents I in opposite directions. If B1 and B2 are magnetic fields at points 1 and 2, as shown in figure then : (1) (2) (3) (4)
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![[From CAT 1996]](https://i.ytimg.com/vi/k6PfUd5fyyw/hqdefault.jpg)
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