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JEE Main2007PhysicsMagnetic Effects of CurrentActual

A current I flows along the length of an infinitely long, straight, thin walled pipe. Then

Options

  1. Athe magnetic field is zero only on the axis of the pipe
  2. Bthe magnetic field is different at different points inside the pipe
  3. Cthe magnetic field at any point inside the pipe is zero
  4. Dthe magnetic field at all points inside the pipe is the same, but not zero

Correct answer

C. the magnetic field at any point inside the pipe is zero

Step-by-step solution

Use Ampere's law

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