The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by
Planck
J.J. Thomson
Einstein
Millikan
(d)
An $\alpha$ particle is accelerated through a p.d of ${10^6}$ volt then $ K.E$ . of particle will be ………. $MeV$
Which of the following is not the property of a cathode ray
An oxide coated filament is useful in vacuum tubes because essentially
Which particles are responsible for conductivity of metals ?
In Milikan’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
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