Why is the electric field inside the dielectric cancelling?

[Abhishek Das]

So, I was studying force between the plates of a capacitor when a dielectric is inserted.

Here is my question
https://ibb.co/cenvXk
Shouldn't it be like this picture below
https://ibb.co/kOUsCk
So, why is my teacher saying that the electric field inside the dielectric cancelling.
So, what would be the force on a plate then?

 

[Insight]

The reason is that the plate polarises the diaelectric and that creates the oposite field inside the other plate which cancels with the first.

 

[Abhishek Das]

The reason is that the plate polarises the diaelectric and that creates the oposite field inside the other plate which cancels with the first.

But, they are in same direction