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NEETPhysicsMagnetic Effects of Current

Match List-I with List-II: List-I List-II (A) Inside a solid current-carrying cylinder ( r (I) B = 0 (B) Outside a solid current-carrying cylinder ( r > R ) (II) B 1 r (C) Inside a hollow current-carrying pipe ( r (III) B r (D) At the surface of a hollow current-carrying pipe ( r = R ) (IV) B is maximum Choose the correct answer from the options given below:

Options

  1. A(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
  2. B(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
  3. C(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
  4. D(A)-(I), (B)-(II), (C)-(III), (D)-(IV)

Correct answer

A. (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

Step-by-step solution

For a solid cylinder of radius R carrying a steady uniform current, the magnetic field inside ( r R ), the magnetic field is inversely proportional to the distance, i.e., B 1 r . For a hollow pipe of radius R , the current flows only on its surface. By Ampere's law, the enclosed current for r Therefore, the correct matching is (A)-(III), (B)-(II), (C)-(I), (D)-(IV). Answer: (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

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