A plane electromagnetic wave travelling along the $X$-direction has a wavelength of $3\ mm$ . The variation in the electric field occurs in the $Y$-direction with an amplitude $66\ Vm^{-1}$. The equations for the electric and magnetic fields as a function of $x$ and $t$ are respectively :-
A plane electromagnetic wave travelling along the $X$-direction has a wavelength of $3\ mm$ . The variation in the electric field occurs in the $Y$-direction with an amplitude $66\ Vm^{-1}$. The equations for the electric and magnetic fields as a function of $x$ and $t$ are respectively :-
- A
$E_y = 33\ cos\ \pi \times 10^{11} \left( {t - \frac{x}{c}} \right)$
$B_z = 1.1 \times 10^{-7}\ cos \pi \times 10^{11}\left( {t - \frac{x}{c}} \right)$
- B
$E_y = 11\ cos\ 2\pi \times 10^{11} \left( {t - \frac{x}{c}} \right)$
$B_z = 11 \times 10^{-7}\ cos 2\pi \times 10^{11}\left( {t - \frac{x}{c}} \right)$
- C
$E_y = 33\ cos\ \pi \times 10^{11} \left( {t - \frac{x}{c}} \right)$
$B_z = 11 \times 10^{-7}\ cos \pi \times 10^{11}\left( {t - \frac{x}{c}} \right)$
- D
$E_y = 66\ cos\ 2\pi \times 10^{11} \left( {t - \frac{x}{c}} \right)$
$B_z = 2.2 \times 10^{-7}\ cos 2\pi \times 10^{11}\left( {t - \frac{x}{c}} \right)$
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