An electromagnetic wave travel along `z`-axis. Which of the following pair of space and time varying fields would generate such a wave?

Options

A. `E_(x),B_(y)`
B. `E_(y),B_(x)`
C. `E_(z),B_(x)`
D. `E_(y),B_(z)`

Answer

A

Explanation

`E_(x)` and `B_(y)` would generate a plane `EM` wave travelling in `z`-direction . `vecE, vecB` and `vecK` from a right handed system `vecK` is along `z`-axis. As `hatixxhatj=hatk`
`rArr E_(x)hatixxB_(y)hatj =C hatk i.e`, `E` is along `x`-axis and `B` is alolng `y`-r=axis