Parallel$-$plate capacitors: The electric field between square the plates of a parabelplate capacitor has magnitude $E.$ The potential across the plates is maintaincus constant voltage by a battery as they are pulled apart to twice their orips separation, which is small compared to the dimensions of the plates. of the electric field between the plates is now equal to

E$.$

$4E.$

$2E.$

E$/2.$

E$/4.$