Q:

What is the difference between anode and cathode?

A:

Quick Answer

An anode and a cathode are the two types of terminals in an electronic device. The cathode is the terminal where current leaves an electronic device. The anode is the terminal where current flows into an electronic device. Electrical current is the amount of charge that passes a fixed point in one unit of time.

Continue Reading
What is the difference between anode and cathode?
Credit: DuFF CC-BY-SA 2.0

Full Answer

In a standard battery, such as a D-size flashlight battery, the anode is the positive terminal and the cathode is the negative terminal. The anode of a battery is involved in an oxidation reaction. Electrons that reside in the anode are transferred into the electrolyte as a result of this reaction. The cathode of a battery is involved in a reduction reaction. This results in the cathode gaining electrons from the electrolyte. Excess electrons in the cathode are forced out through the circuit and back into the anode. Electrons are negatively charged and are repelled by the negatively charged cathode. The force of this repulsion is called voltage.

In other electronic devices the polarity is reversed. The anode is the negative terminal and the cathode is the positive terminal. The flow of current remains the same. Current always flows out of the cathode and into the anode.

Learn more about Chemistry

Related Questions

  • Q:

    How do you build batteries?

    A:

    A battery is made of three main parts: a cathode, an anode and an electrolyte. A simple battery can be made using just a can of soda, a cup and a small piece of copper. The soda acts as the electrolyte, the copper the cathode and the can the anode.

    Full Answer >
    Filed Under:
  • Q:

    What are wet and dry macular degeneration?

    A:

    Wet and dry macular degeneration are the two types of macular degeneration, which is an eye condition that causes visual impairment among the elderly. The occurrence of macular degeneration is closely associated with the aging process, therefore this eyesight disorder is commonly referred to as age-related macular degeneration, or AMD, as stated by WebMD.

    Full Answer >
    Filed Under:
  • Q:

    At which electrode does oxidation occur in a voltaic cell?

    A:

    In a voltaic cell, the oxidation reaction occurs in the anode; this means the metal loses its electrons in this part while the other metal undergoes the reduction reaction and gains the anode's lost electrons. This redox reaction involves the transfer of electrons from one electrode to another.

    Full Answer >
    Filed Under:
  • Q:

    What maintenance extends the life of water heaters?

    A:

    Maintenance that can help extend a water heater’s life includes draining the tank and replacing the anode rod. The tank should be drained annually, and the anode should be changed as needed.

    Full Answer >
    Filed Under:

Explore