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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

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, Pb. PET 2000, JIPMER 2000, JIPMER 2002]

Answer: (B)

Solution

By Ampere's law the field inside a hollow pipe is zero (no enclosed current) while outside

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Question ID VK-078683