A parallel$-$plate capacitor with circular plates of radius $R=0\mathrm{.}076m$ is being discharged. A circular loop of radius $r=0\mathrm{.}16m$ is concentric with the capacitor and halfway between the plates. The displacement current through the loop is $2\mathrm{.}1$ A $.$ At what rate is the electric field between the plates changing?

Number

i $,2\mathrm{.}95$ e $12$