Capacitor-Energy-Dielectric question

[Arman777]

Lets suppose we have a charged plate Q and It has some potential.We put some dielectric between plates the potential will decrease so does energy.My question is where this energy went ?

 

[anorlunda]

You should have faith in conservation of energy. Have you calculated the work required to put the dielectric between the plates?

 

[Arman777]

You should have faith in conservation of energy. Have you calculated the work required to put the dielectric between the plates?

Right it goes to put the dielectric material ?

 

[cnh1995]

My question is where this energy went

The dielectric feels a force of attraction when it is inserted. This suggests loss of energy by the capacitor when the dielectric is fully or partially inserted in the gap.
You need some external force to overcome this attraction and to remove the dielectric from the gap. This suggests gain of energy by the capacitor as work is being done by the external agency.

 

[anorlunda]

Without doing calculations, you know it goes somewhere. What other possibilities are there?

 

[Arman777]

Theres no other possbility I think

 

[anorlunda]

there's no other possbility I think

You answered your own question.

 

[Arman777]

OK thanks both of you