What is the meaning of vibration of electric field vector in electromagnetic waves?

Q. In electromagnetic wave, the phase difference between electric and magnetic field vectors, $\overrightarrow{E}$ and $\overrightarrow{B}$ respectively is :

Q. In case of the electromagnetic waves the angle between the electric and magnetic field vectors is

Q. In an electromagnetic wave the electric field vector and magnetic field vector are given as $\overrightarrow{E}=E_0\hat{i}$ and $\overrightarrow{B}=B_0\hat{k}$ respectively. The direction of propagation of electromagnetic wave is along :

Q. If E and B be the electric and magnetic field vectors of electromagnetic waves, the direction of propagation of electromagnetic waves will be along :

Q. If $\overrightarrow{E}$ and $\overrightarrow{B}$ represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along