Which particles are responsible for conductivity of metals ?
Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction if
Which of the following is not the property of a cathode ray
Who invented $X-$ rays?
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
An electron of charge $‘e’$ coulomb passes through a potential difference of $V$ volts. Its energy in ‘joules’ will be