A plane electromagnetic wave \[{{E}_{z}}=100\cos (6\times {{10}^{8}}t+ – McqOptions

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1.	A plane electromagnetic wave \[{{E}_{z}}=100\cos (6\times {{10}^{8}}t+4x)V/m\] propagates in a medium of dielectric constant
A.	1.5
B.	2.0
C.	2.4
D.	4
Answer» C. 2.4

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