In an accelerator the electrons are accelerated up to an energy of $$50\,\text{MeV}$$. The electrons do not emerge continuously from the accelerator rather they come in pulses at time interval of $$5.0\,\text{ms}$$. Each pulse has a much shorter duration of $$200\,\text{ns}$$. Electron current during the pulse is $$100\,\text{mA}$$, while the current is zero between the two successive pulses, see figure, then