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An element dvecl=dxhati (where dx=1cm) i...

An element `dvecl=dxhati` (where `dx=1cm`) is placed at the origin and carries a large current `i=10A`. What is the magnetic field on the Y-axis at a distance of `0.5m`?

A

`2xx10^(8)`T

B

`4xx10^(8)`T

C

`6xx10^(8)`T

D

`8xx10^(8)`T

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The correct Answer is:
2
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