Columb law for electrostatic force between two point charges and newton law for gravitational force between two the distance between the charges and masses respectively (a) compare the strength of these forces by determining the ratio of their magnitudes (i) for an electron and a proton and (ii) for two protons (b) estimate the acceleratons of electron and proton due to the electrical force oftheir mutual attarction when they are 1A (=10^(-10) m) a part (m_(p)=1.67xx10^(27) kg m_(e )=9.11xx10^(-31) kg)

How does the force of gravitation between two objects change when the distance between them is reduced to half?

Why is that gravitational force negligible compared to the electrostatic force between a proton and an electron? (Assume the distance between them as 1Å )

Hoe does the force of gravitation between two objects change when the distance between them is reduced to half?

Derive the expression for the capacitance of a parallel plate capacitor. And hence write the expression for the capacitance when a dielectric medium is inserted between its plates.

The electric force between two charges each equal to 3muC , when placed in vacuum is 12 N. What will be the force between them, if the charges are embedded in a dielectric of constant 6 ?

A voltmeter reads 4 V when connected to a parallel plate capacitor with air as a dielectric . When a dielectric slab is introduced between plates for the same configuration , voltmeter reads 2 V . What is the dielectric constant of the material ?