Field of one or more infinite charged sheets in each region

1. A.
   $E_{1} = \sigma/\varepsilon_{0},E_{2} = \sigma/2\varepsilon_{0}$
2. B.
   $E_{1} = 2\sigma/\varepsilon_{0},E_{2} = \sigma/\varepsilon_{0}$
3. C.
   $E_{1} = E_{2} = \sigma/2\varepsilon_{0}$
4. D.
   $E_{1} = E_{2} = \sigma/\varepsilon_{0}$

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1. A.
   ${\overrightarrow{E}}_{I} = \frac{2\sigma}{\epsilon_{0}}\widehat{n},{\overrightarrow{E}}_{II} = 0,{\overrightarrow{E}}_{III} = \frac{2\sigma}{\epsilon_{0}}\widehat{n}$
2. B.
   ${\overrightarrow{E}}_{I} = \frac{\sigma}{2\epsilon_{0}}\widehat{n},{\overrightarrow{E}}_{II} = 0,{\overrightarrow{E}}_{III} = \frac{\sigma}{2\epsilon_{0}}\widehat{n}$
3. C.
   ${\overrightarrow{E}}_{I} = - \frac{\sigma}{\epsilon_{0}}\widehat{n},{\overrightarrow{E}}_{II} = 0,{\overrightarrow{E}}_{III} = \frac{\sigma}{\epsilon_{0}}\widehat{n}$
4. D.
   ${\overrightarrow{E}}_{I} = 0,{\overrightarrow{E}}_{II} = \frac{\sigma}{\epsilon_{0}}\widehat{n},E_{III} = 0$

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1. A.
   $\frac{\sigma q}{4\epsilon_{0}}$
2. B.
   $\frac{3\sigma q}{2\epsilon_{0}}$
3. C.
   $\frac{3\sigma q}{4\epsilon_{0}}$
4. D.
   $\frac{\sigma q}{2\epsilon_{0}}$

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