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Electromagnetisms
physics
| Question | Answer |
|---|---|
| Electromagnetic Force | One of the four fundamental interactions in nature, the other three being the strong interaction, the weak interaction, and gravitation. |
| Converts some form of energy directly into electric energy; source of EMF. | A device |
| Source of electromotive force. | A battery |
| electric field and electrons move | In the same direction |
| This creates an electric field (voltage) that moves electrons(current) | A battery |
| Electric potential EMF has units | Per joules per coulomb or volt |
| 2 types of circuit flow | Conventional and Electron |
| The rule where electric current is always the opposite of electron flow (+ to -) | Right Hand Rule |
| The rule where the direction of electron flow is (- to +) | Left Hand Rule |
| Demonstrated that electricity can be used to generate magnetic fields | Oersted's Experiment: Electric current produced a strong enough magnetic field that cause a compass to point toward the wire. |
| A magnetic field associated with electron flow produces _____. | Magnetic field represented by concentric circles |
| Right Hand Rule the magnetic flux rotates _______. | Counter clockwise |
| Left Hand Rule the magnetic flux rotates _______. | Clockwise |
| Helix + electric current = | Solenoid |
| As long as there is an electric current flowing through the solenoid, then there is a ___________. | Magnetic Field |
| Solenoid + Iron Core = | Electromagnet |
| The advantage of and electromagnet | The field can be adjusted, turned ON or OFF by varying current flow. |
| Electromagnetic Induction was discovered when a magnet was moved in and out of a coiled wire | Faraday's Law |
| Basic types of Electromagnetic Induction | Self Induction and Mutual Induction |
| Induction of an opposing voltage in a single coil by its own changing magnetic field | Self Induction |
| The production of an electromotive force in a circuit resulting from a change of current in a neighboring circuit. | Mutual Induction |
| Device that converts mechanical energy into electrical energy | Electric Generator |
| Types of AC power supplies | Single phase, Three phase |
| Electromechanical Devices | Electric generators, Electric motors, Transformers, Autotransformers |
| Coverts electrical energy into mechanical energy | Electric motors |
| Produces low energy, and does not meet requirements for sophisticated xray exams | Single-phase AC |
| Has 3 separate AC input lines producing 3 separate waveforms, produces more efficient xrays. | Three-phase Generators |
| Operates on the principal of Mutual Induction | Transformer |
Created by:
JEN311
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