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An element of length vecDeltal=Deltazhat...

An element of length `vecDeltal=DeltazhatK` is placed at origin and carries a large current l=15A. The magnetic field on the y axis at a distance of 0.75 m is `(Deltaz=0.75 cm)`

A

`2×10^(-8)` T along negative `x-axis

B

`2×10^(-8) T` along positive x-axis

C

Zero

D

`2×10^(-8)`T along negative y-axis`

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