A) \[38.8N\,{{C}^{-1}}\]
B) \[49.5N\,{{C}^{-1}}\]
C) \[32.7N\,{{C}^{-1}}\]
D) \[35.5N\,{{C}^{-1}}\]
Correct Answer: A
Solution :
[a] : The intensity of a plane electromagnetic wave is \[I={{u}_{av}}c=\frac{1}{2}{{\varepsilon }_{0}}E_{0}^{2}c\] or\[{{E}_{0}}=\sqrt{\frac{2I}{{{\varepsilon }_{0}}c}}=\sqrt{\frac{2\times 2.0}{8.85\times {{10}^{-12}}\times 3\times {{10}^{8}}}}\] \[=38.8N{{C}^{-1}}\]
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