Assertion: If a proton and an electron are placed in the same uniform electric field they experience accelerations of different magnitudes.

Reason: Electric force on a charge is independent of its mass.

Assertion: When a charge is placed at a corner of a square, the flux passing through the square will be zero.

Reason: When electric field and area vector are perpendicular to each other at every point, then the flux passing through that surface will be zero.

Assertion: If more electric field lines leave a Gaussian surface than those which enter into it, then the net charge enclosed by that surface will be positive.

Reason: If the net flux passing through a Gaussian surface is zero, then net charge enclosed by that surface will be zero.

Assertion: Under electrostatic conditions net electric field inside a solid conductor will be zero.

Reason: Under electrostatic conditions there will be no free electrons inside a conductor.

Assertion :- An electric dipole experiences maximum force in a uniform electric field when it is placed with its axis at right angles to the field direction.

Reason :- When the axis of a dipole is perpendicular to a uniform external electric field, then torque acting on it will be zero.

Assertion: If a positive charge is released it moves from higher potential to lower potential.

Reason: Force on positive charge is along $\overrightarrow{E}$, which is from high potential to low potential.

Assertion: Electrostatic force between two charges is a conservative force.

Reason: Electric force between two charges is inversely proportional to the square of distance between the two.

Assertion: On going away from a point charge or a small electric dipole, the electric field decreases at the same rate in both cases.

Reason: Electric field is inversely proportional to the square of the distance from the charge in all cases.

Assertion: The electrostatic potential is necessarily zero at a point, where the electric field strength is zero.

Reason: A charged particle in an electric field will move from higher potential region to lower potential region.