A uniform magnetic field $\vec B = \left( {3\hat i + 4\hat j + \hat k} \right)$ exists in region of space. A semicircular wire of radius $1\,m$ carrying current $1\,A$ having its centre at $(2, 2, 0)$ is placed in $x-y$ plane as shown in figure. The force on semicircular wire will be
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$F = i\left( {\vec l \times \vec B} \right)$ where $\vec l = \sqrt 2 \left( {\hat i + \hat j} \right)$
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