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Physics · Electrostatic Potential
हिन्दीTwo large, flat conducting plates carry uniform surface charge densities \( +\sigma \) and \( -\sigma \). What are the values of the electric field in the outer region (above the positively charged plate) and in the inner region between the plates?
Correct answer · Option 3
\( 0 \) and \( \frac{\sigma}{\varepsilon_0} \)
Explanation
In the outer region, the opposing fields cancel: \( E = \frac{\sigma}{2\varepsilon_0} - \frac{\sigma}{2\varepsilon_0} = 0 \). In the inner region, the fields add up: \( E = \frac{\sigma}{2\varepsilon_0} + \frac{\sigma}{2\varepsilon_0} = \frac{\sigma}{\varepsilon_0} \).
