What is the nature of the magnetic field at the centre of a current-carrying circular loop?
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A.
Straight lines
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B.
Concentric circles
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C.
Zig-zag pattern
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D.
Radial lines
Correct Answer:
A. Straight lines
Explanation:
The magnetic field at the center of a current-carrying circular loop is represented by straight lines that are perpendicular to the plane of the loop. According to the right-hand rule, as current flows through the circular path, the magnetic field lines form concentric circles around every segment of the wire. As these lines approach the center of the loop, they become less curved and more concentrated, eventually appearing as a uniform straight line passing through the axis. This occurs because the contributions from all parts of the loop align in the same direction at the very center, resulting in a field that is both maximum in strength and linear in direction at that specific point.
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