Assertion: Electric potential energy of any positive charge is always positive.

Reason: Potential energy is a vector quantity.

Assertion: In electrostatics, electric lines of force can never be closed loops.

Reason: The number of electric lines of force originating from or terminating on a charge 'is proportional to the magnitude of charge.

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: When a positive point charge is placed near a neutral conductor then the latter becomes negatively charged.

Reason: Induction is possible in conductors Only.

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.