In EM waves, the phase difference between electric field and magnetic field vectors is _____ .

A parallel plate capacitor consists of two circular plates of area $100{ \mathrm{cm}}^2$ each. The separation between the plates is $1 \mathrm{mm}$. If the displacement current is $17.7 \mathrm{A}$, then the rate of change of electric field between the plates is $2\times {10}^N \mathrm{N} {\mathrm{C}}^{-1}{ \mathrm{s}}^{-1}$, the value of $N$ is _____ .

(Take ${\epsilon }_0=8.85\times {10}^{-12} \mathrm{F} {\mathrm{m}}^{-1}$)

The electric field between the plates of a parallel plate capacitor having plate area $4{ \mathrm{cm}}^2$ is changing at the rate of $3\times {10}^{12 }\mathrm{N} {\mathrm{C}}^{-1}{ \mathrm{s}}^{-1}$. The displacement current is _____ $\mathrm{mA}$.

Give an answer to the nearest integer value.