Timeline for Motional emf and induced electric fields
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Mar 20, 2022 at 15:23 | comment | added | Jaseon Quanta | As Timaeus said, and worth emphasizing that motinal emf is NOT by a motinal electric field. Many students confused on that. | |
| Sep 25, 2015 at 17:29 | vote | accept | Cyka | ||
| Sep 25, 2015 at 2:22 | answer | added | Timaeus | timeline score: 4 | |
| Sep 24, 2015 at 21:21 | comment | added | Timaeus | And that charge imbalance can cause a conservative electric field, but that field is just keeping the charges inside the wire. Now since the wire is moving you can do work on something and keep it in the wire. But an EMF is not defined as the work done per unit charge. In statics it happens to equal the work per unit charge, but that isn't the definition. | |
| Sep 24, 2015 at 21:20 | comment | added | Timaeus | Motional EMF is due to the magnetic field acting on the moving charges in the moving wire. Induced EMF is due to an actual nonconservative electric field that really exists even in empty space when magnetic fields are changing in time. They are as different as can be, and the electric ones always satisfy the rule for stationary wires, but if you want a corresponding Faraday's law for motional EMF you have to only apply it to thin wires that van keep the charges in the wire. It is a sometimes rule, not an always rule. The magnetic force can lead to a charge imbalance on moving wires. | |
| Sep 24, 2015 at 11:56 | answer | added | Zhengyan Shi | timeline score: 0 | |
| Sep 24, 2015 at 1:32 | history | asked | Cyka | CC BY-SA 3.0 |