When following an electric field line due to a positive point charge:
- *Electric Field*: The electric field decreases as you move away from the positive point charge, as the electric field lines move outward from positive charges and inward toward negative charges.
- *Electric Potential*: The electric potential also decreases as you move away from the positive point charge. This is because electric potential decreases with distance from a positive point charge, and increases with distance from a negative point charge.
So, both the electric field and electric potential decrease as you follow an electric field line due to a positive point charge.