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Diode cathode
Diode cathode







Note: electrode naming for diodes is always based on the direction of the forward current (that of the arrow, in which the current flows "most easily"), even for types such as Zener diodes or solar cells where the current of interest is the reverse current.

diode cathode

In a diode, the cathode is the negative terminal at the pointed end of the arrow symbol, where current flows out of the device. For example, reversing the current direction in a Daniell galvanic cell converts it into an electrolytic cell where the copper electrode is the positive terminal and also the anode.

DIODE CATHODE GENERATOR

For example, the Daniell galvanic cell's copper electrode is the positive terminal and the cathode.Ī battery that is recharging or an electrolytic cell performing electrolysis has its cathode as the negative terminal, from which current exits the device and returns to the external generator as charge enters the battery/ cell. It is continued externally by electrons moving into the battery which constitutes positive current flowing outwards. This outward current is carried internally by positive ions moving from the electrolyte to the positive cathode (chemical energy is responsible for this "uphill" motion).

diode cathode

Whether the cathode is negatively polarized (such as recharging a battery) or positively polarized (such as a battery in use), the cathode will draw electrons into it as well as attract positively charged cations.Ī battery or galvanic cell in use has a cathode that is the positive terminal since that is where conventional current flows out of the device. Positively charged cations always move towards the cathode and negatively charged anions move towards the anode, although cathode polarity depends on the device type, and can even vary according to the operating mode. 3.3 Electroplating metal cathode (electrolysis)Ĭonventional current flows from cathode to anode outside of the cell or device (with electrons moving in the opposite direction), regardless of the cell or device type and operating mode.Ĭathode polarity with respect to the anode can be positive or negative depending on how the device is being operated.







Diode cathode