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Magnitude of B-Field Due to Two Long Straight Wires

APPHEM-U4LIKN

Two long straight wires carry currents as shown below:

Calculate the magnitude of the net magnetic field at Point x if the current in Wire A is $6A$ and the current in Wire B is $2A$.

A

${ 1.125\times10 }^{ -7}T$

B

${ 1.2\times10 }^{ -5 }T$

C

${ 1.125\times10 }^{ -5 }T$

D

${ 7.75\times10 }^{ -6}T$

E

${ 8.7\times10 }^{ -5 }T$