\(=\frac{4 \pi \times 10^{-7}}{2 \times 0.2} \times \sqrt{2}\,T\)
Net magnetic field is
\(B _{ C } \sqrt{2}= \frac{4 \pi \times 10^{-7} \times \sqrt{2}}{2 \times 0.2} \times \sqrt{2} T =2 \pi \times 10^{-6}\,T\)
\(=200 \pi \times 10^{-8}\,T\)
\(=2 \times 314 \times 10^{-8}\,T\)
\(=628 \times 10^{-8}\,T\)