The colour of the positive column in a gas discharge tube depends on
The type of glass used to construct the tube
The gas in the tube
The applied voltage
The material of the cathode
In the Millikan's experiment, the distance between two horizontal plates is $2.5 \,\,cm$ and the potential difference applied is $250\,\, V$ . The electric field between the plates will be ....... $V/m$
What is charge on an electron ?
In a Millikan's oil drop experiment the charge on an oil drop is calculated to be $6.35 \times {10^{ - 19}}C$. The number of excess electrons on the drop is
What is the unit of energy in atomic and nuclear physics ? Define it.
When the speed of electrons increases, then the value of its specific charge