A liquid drops hangs in equillibrium between two copper plates separated by a distacnce of 2cm and maintained at a potential difference of 600 volts. Calculate the charge on the drops if the radius of the drop is 0.1mm and density of the liquid is `800kg//m^(3)`

A 5.80 muF parallel-plate air capacitor has a plate separation of 5.00 mm and is charged to a potential difference of 400 V . Calculate the energy density in the region between the plates, in J/m^3

Two brass plates are arranged horizontally , one 2 cm above the other. The plates are charged to a potential differnece of 6600 V. Now very fine liquid drops are sprayed into the space between the plates . Big drops collect at the bottom plate some drops go up and some remain statinary . How do you explain this ? If the radius of the stationary drops is 2 xx 10^(-6) m and density of liquid 800 kgm^(-3) , calculate the charge carried by the stationary drops. Does this result confirm quantisation of charge?

A small oil drop of mass 10^(-6) kg is hanging in at rest between two plates separated by 1 mm having in at rest between two plates separated by 1 mm having a potential difference of 500 V. The charge on the drop is (g= 10 ms^(-2))

An ail drop having charge 2e is kept stationary between two parallel horizontal plates 2.0 cm apart when a potential difference of 12000 volts is applied between them. If the density of oil is 900 kg//m^(3) , the radius of the drop will be

Calculate the number of molecules present in a spherical drop of water having a radius 1 mm if density of water is 1 g cm^(-3) .

A charged drop of mass 3.2 xx 10^(-12) g floats between two horizontal parallel plates maintained at potential difference of 980 V and separation between the plates is 2 cm. The number of excess or deficient electrons on the drop is

A positively charged oil droplet remins stationary in the electric field between two horizontal plates separated by a distance of 1 cm . The charge on the drop is 10^(-15) C and mass of the droplet is 10^(-11) g , the potential difference between the plates and if the polarity is reversed , the instantaneous of the droplet are

In Millikan's experiment, an oil drop having charge q gets stationary on applying a potential difference V in between two plates separated by a distance 'd'. The weight of the drop is