(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Which statements are correct/incorrect for two oppositely charged, isolated parallel plates: (C=capacitance, U=stored energy, +Q and -Q = charge on the plates).

Correct Incorrect When the distance is doubled, U is unchanged.

Correct Incorrect Inserting a dielectric increases Q.

Correct Incorrect When the distance is doubled, C is halved

Correct Incorrect Increasing the distance, decreases the E field.

Correct Incorrect Inserting a dielectric increases C.

Correct Incorrect When the distance is halved, Q is halved.

Correct Incorrect Inserting a dielectric decreases U.

2. Relevant equations

Below in my answers

3. The attempt at a solution

Now I don't know if I am misunderstanding the concept of Dielectrics or what, but this is what I believe:

A - I thought that this is false because PE = 1/2QV. And I know that the potential difference is dependant on r.

B - False because inserting a dielectric will not increase a charge.

C - True because C = (A/d)*constant

D - True because E = -Change in V/Change in X

E - True because the formula includes multiplying by a constant k.

F - False because Q = V*A*constant/d. Halving distance doubles Q

G - False. A dielectric is only an insualtor that can allow the capacitance to increase.

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# Homework Help: Conceptual Parallel Plate Capacitor

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