So a battery connected with a (forward) diode, we consider the electricity leaving out of the battery Cathode, entering into the diode Anode, leaving out of the diode Cathode and entering into the battery Anode. In conventional flow (how people almost always think of electricity working from the "+" to the "-" of a DC circuit), the Cathode is where electrons leave and the Anode is where electrons enter, so in a battery supplying current we consider the positive terminal the Cathode, and the negative terminal the Anode, in diodes we consider the (forward) "positive" side the Anode and the "negative" side the Cathode. Quote from: sleemanj on May 27, 2017, 12:40:10 am Any confusion you are having may be down to conventional vs electron flow. It is a little bit unusual to refer to the Cathode and Anode of a battery (or supply), probably because of this confusion especially since most people would most commonly use Cathode and Anode in reference to (forward) diodes. It is easier, unless you really really need to, to just go with it and use conventional flow, forget about electron flow, it really doesn't matter that we think of it backwards. In electron flow (how it actually physically works), the electron flow is opposite, electrons enter at the Cathode and exit at the Anode. ![]() During discharging, the electric field is produced by the battery, so the cathode has a higher voltage than the anode.Īny confusion you are having may be down to conventional vs electron flow. During recharging, the electric field is imposed by the external circuit, so the cathode (where current flows out) has a lower voltage than the anode. In electrochemistry, cations are ions attracted to the cathode, anions vice-versa. It is a common cause of confusion because our culture overemphasizes objects (in this case, charges) and underemphasizes processes (in this case, current). When batteries are recharged, the anode and cathode swap places because current is flowing in the reverse direction. The terminal where current flows out of the device into the circuit is called the cathode, and the terminal where current flows into the device is called the anode. The terms anode and cathode have nothing to do with charge, they are about current direction. The second EHT anode is part of a capacitor formed by conductive coating on both sides of the glass bell, and its positive charge is balanced by a negative charge on the outside. The first anode (the plate of the electron gun) is also not charged. It emits electrons thermionically in a continuous process. ![]() In the CRT example, the cathode is never charged. Correct? I saw them mix this up on PBS youtube scishow, and they people in the comments like to pretend they know what they are talking about.Ĭonductors in a circuit are not charged. The negative terminal starts to turn H2O into H+ then neutral H2. Hydrogen gas is made when the Pb H2SO4 chemistry is done then electrolysis starts occurring. They then flow out through the car where they o to the (+) terminal where hydrogen ions (protons or H3O) are waiting for electrons to become neutral. charged atoms or anions migrate to the (-) terminal MAKING it the cathode (cause and effect here is important here). ~Anode is positively charged: That's the thick red high voltage wire toward the front of the CRT, you don't want to touch that. ~Cathodes are negatively charged conductors: The cathode in a cathode ray tube is at the back of the tube and shoots off electrons (cathode rays). Negative anode? My understanding is this: ~Cations are positively charged atoms.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |