Would the Bohr formula for the H- atom remain unchanged if proton had a charge `(+4/3)e` and electron a charge `(-3/4)e`, where e =`1.6xx10^-19C` ? Give reasons for your answer.

The charge on the electron is 1.6 xx 10^(-19) C . The order of magnitude is

An electron is moving with a speed of 3 xx 10^7m//s in a magnetic field of 6 xx 10^-4 T perpendicular to its path. What will be the radius of the path? What will be the frequency and the energy in keV? Given: mass of electron = 9 xx 10^-31 kg , charge e = 1.6 xx 10^-19C , lev = 1.6 xx 10^-19 J .

Calculate the total flux coming out from a closed surface enclosing a particle ( "_2^4He ). (Given : e = 1.6 xxl0^-19C )

An electron in an atom revolving round the nucleus in a circular orbit of radius 5.3 xx 10^-11 m with a speed of 2xx10^6 frac(cm)(s) . Find the resultant orbital magnetic moment and angularmomentum of electron. (Charge on electron e =1.6xx10^-19C , mass of electron m = 9.1 xx 10-31 kg )

How many electrons need be removed from a metal sphere of 0.05 m radius so that it acquires a charge of 4 xx 10^-15 C ? e = 1.6 xx 10^-19 C.

A simplified model of hydrogen atom consists of an electron revolving about a proton at a distance of 5.3 xx 10^-1 1m. The charge on a proton is +1.6 xx 10^-19 C. Calculate the intensity of the electric field due to proton at this distance.

Observations from an experiment on photoelectric effect for the stopping potential by varying the incident frequency were plotted. The slope of the linear curve was found to be approximately 4.1 xx 10^-15 V s . Given that the charge of an electron is 1.6 xx 10^-19 C , find the value of the Planck's constant h.