A) \[{{E}_{x}},{{B}_{y}}\]
B) \[{{E}_{y}},{{B}_{x}}\]
C) \[{{E}_{z}},{{B}_{x}}\]
D) \[{{E}_{y}},{{B}_{z}}\]
Correct Answer: A
Solution :
\[{{E}_{x}}and\,{{B}_{y}}\] would generate a plane EM wave travelling in z-direction, \[\overrightarrow{E},\overrightarrow{B}\,and\,\overrightarrow{k}\] from a right handed system \[\overrightarrow{k}\] is along z-axis. As \[\hat{i}\times \hat{j}=\hat{k}\] \[\Rightarrow {{E}_{x}}\hat{i}\times \]by \[\hat{j}=C\hat{k}\] i.e., E is along x-axis and B is along y-axis.
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