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Magnetic Field Around Current-Carrying Wire

APPH12-LCKFHR

Note that the diagram is not drawn to scale.

What is the magnitude of the magnetic field due to Wire A at Point X in the diagram?

A

$7\times10^{-6}\text{ T}$

B

$4\times10^{-6}\text{ T}$

C

$3\times10^{-6}\text{ T}$

D

$2\times10^{-6}\text{ T}$