According to $J.J. Thomson$,the deflection of cathode particles in an electric discharge tube by electric and magnetic fields depends on which factors?

The mass of the proton is $1840$ times that of an electron. If a proton is accelerated through a potential difference of $1 \,kV$,the kinetic energy of the proton would be

Rutherford's alpha-particle scattering experiment first showed that the atom has a .......

Which of the following particles is represented by the symbol $\alpha$?

The minimum real charge on any particle which can exist is

Fill in the blanks:
$(i)$ When amber or ebonite is rubbed with silk or fur,it produces $......$.
$(ii)$ In a discharge tube,the stream of particles flows from cathode to anode. This is called $......$.
$(iii)$ In a cathode ray tube,a coating of $......$ is applied as a fluorescent material.
$(iv)$ $A$ television picture tube is a type of $......$ tube.