An infinite plane of charge has surface charge density 4.7 mu or micro cc/m2. how far apart are the equipotential surfaces whose potentials differ by 100 v?

charge density of infinite sheet is given as

now the electric field due to this charged sheet will be constant and it is given as

now the relation between electric field intensity and potential difference is given as

now we have

so it is at distance 0.376 mm from the plate

resonant frequency