Question

why is the diode called valve?

Answer 1

The diode valve is so called because it has just two electrodes – the cathode and the anode. These correspond to the two electrodes of the original diode valve ,the cathode being the electrode that is heated and emits electrons, and the anode being the electrode that collects the electrons.

Answer 2

The diode valve is so called because it has just two electrodes – the cathode and the anode. These correspond to the two electrodes of the original diode valve ,the cathode being the electrode that is heated and emits electrons, and the anode being the electrode that collects the electrons.
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