Concept:Hans Christian Ørsted discovered that a straight current-carrying conductor generates a magnetic field in the surrounding three-dimensional space, the shape of which is determined by the Right-Hand Grip Rule.
Solution:- If you grasp a straight wire with your right hand such that your thumb points in the direction of the conventional current...
- Your fingers will naturally curl around the wire.
- This curl physically traces the path of the magnetic field lines, forming closed, concentric circular loops centered on the wire axis.
Why other options are incorrect:Options B and D imply the field lines are straight and parallel to the wire, which is entirely false. Option C describes the topology of an electric field extending from a line of static charge, not a magnetic field.
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