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Electromagnetism II
physics
| Question | Answer |
|---|---|
| Electromagnetic force | 1 of 4 fundamental forces of nature. A push or pull of and object. |
| Electromotive Force (EMF) | Any device that coverts some form of energy directly into electric energy. |
| Battery | Is a source of electro motor force. |
| Electric field | Voltage |
| Electrons | Current |
| A battery creates _________________________ . | Electric field that moves the electrons. |
| The electric field and the electrons are in the __________ direction. | same. |
| Electric potential is measured in ___________. | joules per coulomb or volt |
| Single unit of electric charge is a ________. | Electron |
| Motor is the ________ of a generator. | opposite |
| A physicists conventional rule for electric current flow. | Right Hand Rule |
| Current flow | Movement of electric charge |
| Electron current flow is considered the ________ rule. | Left hand rule |
| Electric current runs _____________. | Positive to negative |
| Electron current flow runs ____________. | Negative to positive |
| Oersted's Eperiment | An electric current produced a magnetic field strong enough to cause a magnetic compass to point toward the wire. |
| A magnetic field associated with electron current flow through a wire produces a ____________________. | magnetic field represented by concentric circles. |
| Electron current flow runs _______________. | North to south |
| Left hand rule | Electron current flow produces magnetic flux line that run clockwise. |
| Right hand rule | Electric current flow produces magnetic flux lines that run counter clockwise. |
| Each coil has its own _____________. | magnetic field |
| Solenoid | Is a helix + Electrical current |
| Coil of wire | helix |
| As long as there is a magnetic field flowing through the solenoid then there is a ___________. | magnetic field |
| Current flowing through a loop is strongest ________________. | In the center of the loop |
| Solenoid + Iron core | Electromagnet |
| ferromagnetic material | Iron |
| Advantage of an electromagnet | It can be turned on and off by varying current flow. |
| Results from a movement of a magnet in or out of a coil. | Electromagnetic Induction |
| Discovered that if a magnet is moved, a current flows in a coiled wire. | Faraday |
| An electric current is induced to flow in a circuit if some part of that circuit is in a _________________. | changing magnetic field |
| A changing magnetic field can be produced by moving a: 1) and 2) | 1) Bar magnet or an electromagnet near a coil of wire. 2) Coil of wire near a stationary magnetic field |
Created by:
JEN311
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