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Capacitors with Dielectrics

  • Thread starter Gear300
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  • #1
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For a capacitor not connected to a battery, why does the voltage decrease with the insertion of a dielectric. Would it be because the net electric field between the conductors is decreased?
 

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  • #2
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you just answered your own question. there is also less room for particles to lose potential over.
 
  • #3
Dick
Science Advisor
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you just answered your own question. there is also less room for particles to lose potential over.
Gear300, your answer is a lot better than this one. Yes, the dielectric decreases the electric field. What do you mean "less room"???
 
  • #4
83
1
alternative method :
Q=CV
V=Q/C

insert a dielectric , keeping the charge accumulated unchanged. the greater the dielectric(coefficient e), the greater the capacitance and the lower the voltage across

but why. it is related to the properties of dielectric ... and polarization makes the V decreases as well as .... that's another story
 
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