Two coaxial solenoids have radi r& and humber of turms per unit length n, and n,. magnetic field in the regionr

Two coaxial solenoids have radi r& and humber of turms per unit length n, and n,. Magnetic field in the regionr

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  Mahak

  ans is b because in between two solenoids the number of turns are used of large coil which is n2 and the current is I so option b is correct

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  but answer is a!!!!!

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  there is some discrepancy because no of coils are used for large one only I will clear and inform you

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