An EM wave is propagating in a medium with a velocity \(\overrightarrow{\mathrm{v}}=\mathrm{v} \hat{i}\). The instantaneous oscillating electric field of this EM wave is along the +y axis. The direction of the oscillating magnetic field of the EM wave will be along:

1. -z-direction

2. +z direction

3. -y-direction

4. +y direction

In an electromagnetic wave in free space the root mean square value of the electric field is $E_{rms}=6$ V/m. The peak value of the magnetic field is:

1. 1.41$\times {10}^{-8}T$

2. $2.83\times {10}^{-8}T$

3. $0.70\times {10}^{-8}T$

4. $4.23\times {10}^{-8}$ $T$ $$

Out of the following options which one can be used to produce a propagating electromagnetic wave?