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Cross Product Review

What is the cross-product of


\vec{A}=2\hat{\mathcal{i}}+3\hat{\mathcal{j}}

and


\vec{B}=\hat{\mathcal{i}}-2\hat{\mathcal{j}} +\hat k

Biot Savart Law

Find an expression for the magnetic field strength at the center (point P) of the circular arc in the figure below.

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