Chapter 24, Problem 5DQ

(a)

To determine

To check: Whether the electric field between the plates is uniform when the separation $d$ is much larger than the size of the plates.

(b)

To determine

To check: Whether the value of $V_{ab}$ is more or less than the formula $V_{ab}=\frac{Qd}{{\epsilon }_{0}A}$ when the plates are pulled apart.

(c)

To determine

To check: Whether the value of capacitance is more or less when the plates are pulled apart.