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प्रश्न
What is the magnetic field at the centre of the outer large coil when it carries current \[I_2\] ?
पर्याय
\[B_2=\frac{2\mu_0I_2}{r_2}\]
\[B_2=\frac{\mu_0I_2}{2r_1}\]
\[B_2=\frac{\mu_0I_2}{2r_2}\]
\[B_2=\mu_0n_1I_1\]
MCQ
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उत्तर
The current \[I_2\] in the outer coil produces a field at its centre. For radius \[r_2\] , that field is \[B_2=\frac{\mu_0I_2}{2r_2}\] .
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