Physics - Electrostatics Question with Solution | TestHub

An electric field$\overrightarrow{E}=4x\widehat{i}-\left(y^2+1\right)\widehat{j}N/C$passes through the box shown in figure. The flux of the electric field through surfaces$ABCD$and$BCGF$are marked as${\varphi }_{\text{I}}$and${\varphi }_{\text{II}}$respectively. The difference between$\left({\varphi }_I-{\varphi }_{II}\right)$is (in$\mathrm{N}{\mathrm{m}}^2/\mathrm{C}$) ____________.