[" 1.A Copper atom has "29" electrons revolving around the nucleus.A copper ball contains "4times10^(23)],[" atoms What fraction of the electrons be removed to give the ball a charge of "+9*6 mu C" ? "]

A copper sphere of mass 2g contains nearly 2xx10^(22) atoms. The charge on the nucleus of each atom is 29 e . What fraction of the electrons must be removed from the sphere to give it a charge fo + 2muC ?

If an object of mass 1 kg contains 4xx10^(20) atoms. If one electron is removed from every atom of the solid, the charge gained by the solid in 1 g is

In an hydrogen atom, the electron revolves around the nucles in an orbit of radius 0.53 xx 10^(-10) m . Then the electrical potential produced by the nucleus at the position of the electron is

A hydrogen-like atom has one electron revolving around a stationary nucleus. The energy required to excite the electron from the second orbit to the third orbit is 47.2 eV. The atomic number of the atom is

In Bohr model of hydrogen atom , the electron revolves around the nucleus in a circular orbit of radius 5.1 xx 10^(-11)m at a frequency of 6.8 xx 10^(15) revolutions per second. Find the equivalent current at may point on the orbit of the electron

An electron revolves around the nucleus of an atom in a circular orbit of radius 4 Å with a speed of 5xx 10^(6)m//s . What is the angular momentum of the electron ? [ m_(e) = 9 xx 10^(-31) kg ].

An electron revolves around the nucleus of an atom in a circular orbit of radius 4 Å with a speed of 6.0 xx 10^(6) m//s . If mass of electron is 9.0 xx 10^(-31) kg , what is its angular momentum ?

In an atom, electrons revolve around the nucleus in circular orbits. Can this be treated as electric current? If an electron revolves around the nucleus 2000 times in one second, what is the equivalent current? Given charge of the electrons as 1.6 xx 10^(-19)C .