Introduction
| Electrochemical cell (Galvanic Cell) | Electrolytic cell |
|---|---|
| The electrons are supplied by the species getting oxidized. They move from anode to the cathode in the external circuit. | The external battery supplies the electrons. They enter through the cathode and come out through the anode. |
What is the direction of electron flow?
The flow of electrons is termed electron current. Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative.
Where do electrons flow in a voltaic cell?
Electrons always flow from the anode to the cathode or from the oxidation half cell to the reduction half cell. In terms of Eocell of the half reactions, the electrons will flow from the more negative half reaction to the more positive half reaction. A cell diagram is a representation of an electrochemical cell.
How do electrons flow in a galvanic cell?
Electrons flow from the anode to the cathode through an external wire. Since Cu²⁺ is reduced, the Cu electrode is the cathode. So, in a galvanic cell, electrons flow from anode to cathode through an external circuit.
Do electrons flow to anode or cathode?
Since electrons have a negative charge, the direction of electron flow is opposite to the direction of conventional current. Consequently, electrons leave the device through the anode and enter the device through the cathode.
What happens if light doesn’t have a ground wire?
If the fixture is out of reach, the lack of a ground is probably a low risk. If it is a pull chain light, use of a string pull rather than metal is a good idea. Yes, if you have a metal light fixture your fixture needs to be grounded. The ground wire exits your junction box, but it is not attached to your junction box.