A) the magnetic field at all points inside the pipe is the same but not zero
B) the magnetic field at any point ins die the pipe is zero
C) the magnetic field is zero only on the axis of the pipe
D) the magnetic field is different at different points ins die the pipe
Correct Answer: B
Solution :
A current \[l\] flows along the length of an infinity lo straight, thin walled pipe then the magnetic field any point inside the pipe is zero.
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