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KCET2020PhysicsMagnetic Effects of Current

A long cylindrical wire of radius R carries a uniform current I flowing through it. The variation of magnetic field with distance r from the axis of the wire is shown by

Correct answer

2

Step-by-step solution

Magnetic field due to long cylindrical wire of radius R inside the cylinder at a distance r R is given as B_ out = ₀ I 2 r i.e. B_ out 1 r ...(ii) From Eqs. (i) and (ii), graph between B and r drawn as

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