Question

. A long wire lies along the x -axis and carries a current in the positive...

. A long wire lies along the

x

-axis and carries a current in the positive

x

-direction with magnitude

I

x

= 90 A. A second long wire lies along the

y

-axis and carries a current in the positive

y

-direction with

magnitude

I

y

= 45 A. A third wire lies along the

z

-axis and carries a current in the positive

z

-direction

with magnitude

I

z

= 50 A. Determine the magnitude of the net magnetic field in the

xy

-plane at the

point

r

= (0

.

030

ˆ

ı

+ 0

.

040

ˆ

) m. (Answer 2.5 G)

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