In a triode valve, the plate current reaches its maximum value when the grid potential is

Step-by-step solution

In a triode valve, the grid is placed between the cathode and the plate to control the flow of electrons. When the grid is given a positive potential with respect to the cathode, it attracts the electrons emitted by the cathode. This positive potential helps in neutralizing the space charge effect and accelerates a large number of electrons towards the plate. As a result, the plate current increases significantly. When the grid potential is sufficiently positive, almost all the electrons emitted by the cathode are