Energy and potential when a dielectric is inserted into a charged isolated capacitor

1. A.
   $\frac{U_0}{K}$
2. B.
   $\frac{U_0}{K^2}$
3. C.
   $U_0 K^2$
4. D.
   $\frac{U_0}{2}$

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1. A.
   V increases, E decreases.
2. B.
   V decreases, E increases.
3. C.
   both V and E increase.
4. D.
   both V and E decrease.

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1. A.
   $1 \times 10^{-10}$ J
2. B.
   $2 \times 10^{-10}$ J
3. C.
   $5 \times 10^{-10}$ J
4. D.
   $6 \times 10^{-10}$ J

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