The radius of the circular conducting loop shown in figure is \( R \). Magnetic field is decreas...

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The radius of the circular conducting loop shown in figure is \( R \). Magnetic field is decreasing at a constant rate \( \alpha \). Resistance per unit length of the loop is \( \rho \). Then current in wire \( A B \) is ( \( A B \) is one of the diameters)
(a) \( \frac{R \alpha}{2 \rho} \) from \( A \) to \( B \)
(b) \( \frac{R \alpha}{2 \rho} \) from \( B \) to \( A \)
(c) \( \frac{2 R \alpha}{\rho} \) from \( A \) to \( B \)
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