Electric field lines radiate outward from positive charges

Steps:

• Electric field direction at any point is the force direction on a positive test charge.
• For a positive point charge, field lines originate at the charge and extend radially outward.
• Lines are denser near the charge, indicating stronger field, and point away perpendicular to equipotential surfaces.
• Select diagram with arrows starting from center and diverging symmetrically outward.

Why A is correct:

• Arrows emanate radially from the positive charge, aligning with the definition that field lines point away from positive charges per Coulomb's law.

Why the others are wrong:

• B: Arrows converge inward, depicting field for a negative charge.
• C: Arrows form closed loops, violating field line rule of starting/ending on charges.
• D: Arrows are uniform and parallel, representing uniform field, not radial pattern near a point charge.

Final answer: A