If a long hollow copper pipe carries a direct current, the magnetic fi – McqOptions

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1.	If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be [CBSE PMT 1999; AFMC 1999; CPMT 1984, 2000; Pb. PET 2000; JIPMER 2002]
A.	Only inside the pipe
B.	Only outside the pipe
C.	Neither inside nor outside the pipe
D.	Both inside and outside the pipe
Answer» C. Neither inside nor outside the pipe

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