An electron of charge $‘e’$ coulomb passes through a potential difference of $V$ volts. Its energy in ‘joules’ will be
$V/e$
$eV$
$e/V$
$V$
Define work function of metal and write its unit.
In Thomson's experiment if the value of $q/m$ is the same for all positive ions striking the photographic plate, then the trace would be
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 the speed of electrons increases, then the value of its specific charge
Which of the following is not the property of a cathode ray