Force between capacitor plates

Main Question or Discussion Point

What will happen to the force between the capacitor plates (Will increase or decrease or remain constant) if we introduce a dielectric between them?

As per the answer given the physics text book , the force will remain same? But as per my understanding the force should decrease since electrical field between the plates reduces.

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Paul Colby
Gold Member
The surface charge on a plate is given by the normal $D=\epsilon E$ field. The force is the charge times the $E$ field. For the same amount of charge, the $E$ field is reduced since $\epsilon>1$ so the force will go down.

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