Diode Anode And Cathode

The key difference between anode and cathode is that anode is the positive terminal while cathode is the negative terminal. A diode has two terminals.

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Anode is the electrode at which current leaves the cell and where oxidation takes place while cathode is the electrode at which current enters the cell and reduction takes place.

Diode anode and cathode. Anode and cathode refer to function not structure. In the general sense current refers to any movement of electrical charge. The anode and cathode are defined by the flow of current.

Current through a diode can only flow from the anode to the cathode which would explain why its important for a diode to be connected in the correct direction. Like a typical diode there is a fixed anode and cathode in a zener diode but it will conduct current in the reverse direction electrons flow from anode to cathode if its breakdown voltage or zener voltage is exceeded. You should never use the terms anode or cathode to describe the structural parts of a zener diode for the same reason you should not use such terms for the structure of a rechargeable battery.

The diode circuit symbol with the anode and cathode marked. When a voltage source is connected to a diode such that the positive side of the voltage source is on the anode and the negative side is on the cathode the diode becomes a conductor and allows current to flow. The positive side is called the anode and the negative one is called the cathode.

However you should keep in mind the convention that current direction is according to where a positive charge would move not a negative charge.

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