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An electrode is a conductor through which electric current passes in and out of a non-metallic medium. Put simply; it’s a component used to make electrical contact with a non-metallic circuit.

The word “Electrode” comes from the Greek word “electro” meaning “amber” and “hodos” meaning “way.” This term refers to the study of static electricity, which was first conducted through pieces of amber.

Types of Electrodes:

There are different types of electrodes, including:

1. Anode:

An Anode is an electrode that positively charges when current flows through it; it attracts electrons from the surrounding environment.

2. Cathode:

A cathode is the opposite of an anode, negatively charged electrode that attracts positive charges or ions when an electric current flows through it.

3. Metal Electrode:

Metal electrodes are used when conducting electricity through a non-metallic material. Common types of metallic electrodes are platinum, gold, silver, nickel, etc.

4. Non-Metal Electrode:

Non-metal electrodes are used when conducting electricity through a non-metallic material. Common types of non-metallic electrodes are carbon, graphite, etc.

Uses of Electrodes:

Electrodes have various applications in the field of science, medicine, and technology:

1. Welding:

Electrodes are used in welding to generate heat through electrical resistance and join two metals together. Metallic electrodes are used for welding all kinds of metals.

2. Electrolysis:

Electrodes are used in electrolysis processes to separate a chemical compound into its components via electricity. Suitable for manufacturing and the purification of metals.

3. Medical Devices:

Medical electrodes are used in electroencephalography (EEG), electrocardiography (ECG), and other medical machines that keep track of vital signs and test nerve and brain activity.

4. Batteries:

Batteries are made up of electrodes that can either emit or take in electrons. It’s used in automotive, communication, medical, and consumer batteries.

Conclusion:

Electrodes play a significant role in many industrial, technological, and medical applications, generating and conducting electricity through non-metallic substances safely. They enable us to harness the power of electricity in unique and exciting ways.