An oil drop of radius `10^(-6)m` carries a charge equal to that on an electron. If the density of the oil is `2xx10^(3)kg m^(3)`, find the electric field required to keep it stationary. Take `e=1.6xx10^(-19)C` and `g=9.8 ms^(-2)`.

An oil drop of radius r carrying a charge q remain stationary in the presence of electric field of intensity E. If the density of oil rho , then

An oil drop has 8.01 xx 10^(-19) C charg .Calculate the number of electrons in this drop.

An oil drop has 6.39 xx 10^(-19)C charge .How many electrons does this oil drop has ?

A water droplet of radius 1 micron in Milikan oil drop appartus in first held stationary under the influence of an electric field of intensity 5.1xx10^(4) NC^(-1) . How many excess electrons does it carry ? Take e = 1.6xx10^(-19) C, g = 9.8 ms^(-2) and density of water of = 10^(3) kg m^(-3) .

An oil drop has 8.0 xx 10^(-19)C charge. How many electrons does this oil drop has?

Calculate the electric potential energy of an electron-proton system of an atom . The radius of the orbit of the electron is 21.16xx10^(-11) m the charge on electron is 1.6xx10^(-19)C .

The electric field that can balance a charged particle of mass 3.2xx10^(-27) kg is (Given that the charge on the particle is 1.6xx10^(-19)C )

If an oil drop of weight 3.2xx10^(-13) N is balanced in an electric field of 5xx10^(5) Vm^(-1) , find the charge on the oil drop.

What is the drift velcity of electrons in silver wire of length 1 m having cross-sectional area 3.14xx10^(-6)m^(2) and carrying a current of 10 A . Given atomic mass of silver =108, density of silver =10.5xx10^(3) kg m^(-3) , charge on electron =1.6xx10^(-19) C and Avogadro's number =6.023xx10^(26) per kt-atom.

A charged water drop of weight 4 xx 10^(-18) kg and charge 1.6 xx 10^(-19) C is stable in an electric field . What is the intensity of electric field