Verified Solution • 2025–26 Session moderate

QJEEM07Ph2e40: JEE Main 2007 Physics - Class 12 JEEM07Ph2e40 Solution: A current flows along the length of an infinitely long,…

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

Multiple Choice Options

  • A the magnetic field at all points inside the pipe is the same, but not zero
  • B the magnetic field is zero only on the axis of the pipe
  • C the magnetic field is different at different points inside the pipe
  • D the magnetic field at any point inside the pipe is zero

Step-by-Step Verified Solution

There is no current inside the pipe. Therefore

∮B‾.dℓ‾=μ0I\oint {\overline B .\overline {d\ell } } = {\mu _0}I

I=0I=0

∴\therefore B=0B=0

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