Final answer:
A diode is an electronic device that allows current flow in only one direction.
Step-by-step explanation:
A diode is an electronic device that allows current flow in only one direction. This means that it acts as a one-way valve for electric current. When the diode is forward biased, with the anode positive and the cathode negative, current flows through it. However, when it is reverse biased, current does not flow.
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