Ans:
An electrical device with two active terminals, an anode and a cathode,
through which current passes more easily in one direction (from anode to
cathode) than in the reverse direction. Diodes have many uses,
including conversion of AC power to DC power, and the decoding of
audio-frequency signals from radio signals.or,
The heated cathode generates a cloud of electrons that are attracted by the anode, causing a current to flow from the cathode to the anode. Because the anode cannot generate electrons of its own, the current cannot flow in the opposite direction.
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