A) \[17\times {{10}^{-22}}\,N/C\]
B) \[1\centerdot 5\times {{10}^{-15}}\,N/C\]
C) \[1\centerdot 9\times {{10}^{-10}}\,N/C\]
D) zero
Correct Answer: D
Solution :
The electric field is region III is also zero \[{{E}_{III}}={{E}_{A}}+{{E}_{B}}=\frac{\sigma }{2{{\varepsilon }_{0}}}+\left( -\frac{\sigma }{2{{\varepsilon }_{0}}} \right)=0\]
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