\(=5 \times(0.2) \times(0.1)(-\hat{\mathrm{i}})\)
\(=0.1(-\hat{\mathrm{i}})\)
\(\vec{\tau}=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}=0.1(-\hat{\mathrm{i}}) \times\left(2 \times 10^{-3}\right)(\hat{\mathrm{j}})\)
\(=2 \times 10^{-4}(-\hat{\mathrm{k}}) \mathrm{N}-\mathrm{m}\)
$\left[{m}_{{p}}=1.67 \times 10^{-27} {kg}, {e}=1.6 \times 10^{-19} {C},\right.$ પ્રકાશની ઝડપ $\left.=3 \times 10^{8} {m} / {s}\right]$