Which of the following is not the property of a cathode ray
It casts shadow
It produces heating effect
It produces flurosence
It does not deflect in electric field
Explain emission of electron from metal. Define work function. Write its unit, work function of metal depend on which factors ?
$1$ $J$ is equal to how many electron volt?
An electron is accelerated through a potential difference of $200$ volts. If $e/m$ for the electron be $1.6 \times {10^{11}}$ $coulomb/kg$ , the velocity acquired by the electron will be
When cathode rays (tube voltage $~ 10 kV$) collide with the anode of high atomic weight then we get
In an electron gun, the electrons are accelerated by the potential $V$. If e is the charge and $m$ is the mass of an electron, then the maximum velocity of these electrons will be