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Question:
A current I flows along the length of an infinitely long, straight, thin-walled pipe. Then
A current I flows along the length of an infinitely long, straight, thin-walled pipe. Then
Updated On: Mar 7, 2024
- the magnetic field at all points inside the pipe is the same, but not zero
- the magnetic field at any point inside the pipe is zero
- the magnetic field is zero only on the axis of the pipe
- the magnetic field is different at different points inside the pipe
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The Correct Option is B
Solution and Explanation
Using Ampere's circuital law over a circular loop of any radius less than the radius of the pipe, we can see that net current inside the loop is zero. Hence, magnetic field at every point inside the loop will be zero.
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Concepts Used:
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Magnetic Field:
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F = q [ E (r) + v × B (r)] ≡ EElectric +Fmagnetic
This force was based on the extensive experiments of Ampere and others. It is called the Lorentz force.
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