# Force between the plates of a capacitor when a dielectric slab is added

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Say there are two parallel plates separated by a small fixed distance d and charged +q, -q. The force attracting the plates is F. If a solid block of dielectric (dielectric constant k) is introduced between the plates, will the force of attraction be different from F.

My answer: The electric field will be reduce by a factor of 1/k; thus the force is lesser than F.

jbriggs444
Homework Helper
Say there are two parallel plates separated by a small fixed distance d and charged +q, -q. The force attracting the plates is F. If a solid block of dielectric (dielectric constant k) is introduced between the plates, will the force of attraction be different from F.
Try a related question first. Instead of introducing a dielectric, reduce the separation between the plates by a factor of 2. Does the attractive force increase, decrease or remain the same?

sophiecentaur
sophiecentaur