Answer
We can rank the arrangements according to the magnitude of the electric field present in the region:
$(1) \gt (2) = (3)$
Work Step by Step
Let $d$ be the distance from the top of the diagram to the bottom.
We can find an expression for the magnitude of the electric field in each case:
(1) $E = \frac{\Delta V}{d} = \frac{100~V-20~V}{d} = \frac{80~V}{d}$
(2) $E = \frac{\Delta V}{d} = \frac{-100~V-(-140~V)}{d} = \frac{40~V}{d}$
(3) $E = \frac{\Delta V}{d} = \frac{-10~V-(-50~V)}{d} = \frac{40~V}{d}$
We can rank the arrangements according to the magnitude of the electric field present in the region:
$(1) \gt (2) = (3)$
