GCEPhysicsElectricity and Magnetism2023

Which of the following statements correctly describes the direction of the magnetic field around a straight current-carrying conductor?

AThe field lines are parallel to the conductor and point in the direction of current flow.
BThe field lines form concentric circles around the conductor, with direction given by the right-hand grip rule.CORRECT
CThe field lines radiate outward from the conductor like spokes of a wheel.
DThe field lines form concentric circles around the conductor, with direction always clockwise when viewed from any end.
AI
Toaster Teacher
Why the answer is B, and why the others tempt you.
The magnetic field around a straight current-carrying conductor forms concentric circles centred on the conductor. The right-hand grip rule states that if the right thumb points in the direction of conventional current, the curled fingers indicate the direction of the magnetic field lines. Option D is wrong because the direction depends on the direction of current flow, not always clockwise.
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