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A system of long four parallel conductor...

A system of long four parallel conductors whose sections with the plane of the drawing lie at the verties of a square there flow four equal currents.

The directions of these currents are as follows : those marked `ox` point away from the reader, while those marked with a dot point towards the reader. How is the vector of magnetic induction directed at the centre of the square?

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MOTION-MAGNETISM -EXERCISE-3 (Level-I)
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  11. A U-shaped wire of mass m and length l is immersed with its two ends i...

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  13. A current I, indicated by the crosses in fig. is established in a stri...

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  14. A current I, indicated by the crosses in fig. is established in a stri...

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  15. A current I, indicated by the crosses in fig. is established in a stri...

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  16. A current I, indicated by the crosses in fig. is established in a stri...

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  17. A current I, indicated by the crosses in fig. is established in a stri...

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  18. Two long straight parallel conductors are separated by a distance of 5...

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