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- Need clarity, kindly explain! - Magnetic Effects of Current and Magnetism - JEE Main-2
A current flows along the length of an infinitely long, straight, thin walled pipe. Then
- Option 1)
the magnetic field at all points inside the pipe is the same, but not zero
- Option 2)
the magnetic field is zero only on the axis of the pipe
- Option 3)
the magnetic field is different at different points inside the pipe
- Option 4)
the magnetic field at any point inside the pipe is zero
Answers (1)
As we learnt in
Ampere's Law -
Total Current crossing the above area is
- wherein
Outward postive
Inward negative X
Magnetic field is shielded and no current is inside the pipe to apply Ampère’s law. (Compare to electric field inside a hollow sphere).
Option 1)
the magnetic field at all points inside the pipe is the same, but not zero
Incorrect option
Option 2)
the magnetic field is zero only on the axis of the pipe
Incorrect option
Option 3)
the magnetic field is different at different points inside the pipe
Incorrect option
Option 4)
the magnetic field at any point inside the pipe is zero
Correct option
JEE Main high-scoring chapters and topics
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