Term
| Single Pole Single Throw Switch |
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Definition
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Definition
| Two Inputs one output for each circuit |
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| closes circuit when pushed. returns to open (off) position |
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| Toggle Switches limited by: |
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Definition
| No more than 2 throws, current limited by physical size |
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Term
| Momentary contact switches |
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Definition
| used for limit switches e.g. landing gear |
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Definition
| Fixed core devices, LOW power |
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Definition
| Movable core devices: heavy duty |
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Term
| Solenoids can be used to: |
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Definition
| Control mechanical action |
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Definition
| Reduce current flow in a circuit, Convert elec. energy to heat |
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Definition
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| Store elect. energy: made up of metal plates which can store energy |
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| Capacitance is measured in: |
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Definition
| Used to increase voltage in an AC Circuit: TWO coils (wall warts) |
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Definition
| small mass, NEGATIVELY charged |
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| Positively charged, center of atom relatively large mass |
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Definition
| neutral charge same mass as proton |
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Definition
| an atom with an excess or deficiency of electrons |
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Definition
number of chemical bonds that can form in an atom
Determines if conductor or insulator |
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Definition
| copper, gold, silver Nearly EMPTY outer orbit |
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Definition
| No room for free electrons: Plastic air glass |
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| Half outer orbit full: Silicon, arsenic |
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Definition
| a method to remove insulation from a wire |
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Definition
| How many nicks or broken strands are acceptable when stripping wire |
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Definition
| Joins two or more metals by melting and flowing a filler into the joint. |
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Definition
| A mixture of copper and tin- ratio varies |
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Definition
| An agent used to prevent oxidization in the solder |
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Definition
| Electrical pressure: VOLTS: Electromotive force |
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| The location of the positive connection compared to the negative connection |
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Definition
| Current flows in one direction- linear |
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Definition
| The polarity constantly changes- flows in one direction and REVERSES |
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Definition
| How often the current reverses, constant per system Measured in Hertz (HZ) |
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Term
| Stationary sources of power produce: |
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Definition
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Term
| Brushless motors can be used with: |
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Term
| Aircraft engines are started with: |
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Definition
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Term
| Three phase systems produce: |
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Definition
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Term
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Definition
| 6.28 BILLION ELECTRONS: the current that will pass through a silver nitrate solution and will cause .0011 milligrams of silver to deposit on an electrode. |
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Definition
| inversely proportional to current flow |
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Definition
| A material that attracts ferrous metals |
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Definition
| two poles (North and South) |
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Definition
| Almost constant magnetic field |
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Definition
| The magnetic field changes under certain circumstances |
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Definition
| The field of force existing between the poles of a magnet. called magnetic FLUX- has poles |
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Definition
| The process of producing a magnetic field using an electric current. used in Relays, solenoids, motors |
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Term
| Polarity of a magnetic field is determined by: |
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Definition
| Direction of current flow |
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Term
| Strength of a magnetic field is determined by: |
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Definition
| STRENGTH of current, number of turns of the coi |
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Term
| Electromagnetic induction: |
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Definition
| When an electrical voltage/current produces magnetic fields and motion |
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Term
| 3 elements required for electromagnetic induction |
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Definition
| 1: conductor 2:Magnetic Field 3: Motion between magnetic field and conductor |
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Term
| Left hand rule for generators: |
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Definition
| determines voltage polarity of electrical power. - direction of current flow |
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Term
| Factors influence amount of voltage/current |
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Definition
| strength of magnetic field, number of coils: speed of motion between coils and magnet |
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Definition
| one or more electromechanical cells that convert stored chemical energy into electrical energy: |
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Definition
| Invented in 1800 called voltaic pile by Alesssandro Volta |
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Term
| The net voltage of any cell is determined by: |
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Definition
| chemical structure of the electrodes |
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Definition
| Not rechargeable, higher energy density- alkaline |
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Definition
| rechargeable: lower energy density: good for high loads |
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Term
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Definition
| liquid electrolyte covers all internal parts: gasses are produced |
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Definition
| electrolyte is more of a paste, e.g zinc-carbon |
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Term
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Definition
| anode(negative)- zinc cathode(positive)-carbon electrolyte is ammonium chloride {1.5 volts} |
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Term
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Definition
| Low maintenance lead-acid battery doesn't need water ALSO called VERLA (valve regulated lead acid battery) |
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Term
| sealed lead-acid batteries: |
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Definition
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Term
| Most aircraft batteries are: |
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Definition
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