Right-hand rule for magnetic field around a current-carrying wire

Steps:

• Identify current direction: into the page (thumb points into page using right hand).
• Curl fingers of right hand around wire: direction shows magnetic field circling clockwise.
• Field lines form concentric circles perpendicular to wire.
• Match diagram to clockwise circular pattern viewed from above.

Why C is correct:

• Depicts clockwise circular field lines, matching right-hand rule for current into page.

Why the others are wrong:

• A: Shows counterclockwise circles, opposite to right-hand rule direction.
• B: Uses straight lines, not circular field shape.
• D: Displays irregular or radial pattern, violating concentric circle law.

Final answer: C