Term
| What is the smallest unit of electrical charge? |
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Definition
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Term
| What is Direct current? D/C |
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Definition
| The electrons flow at a steady stream in one single direction. For example: Battery |
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Term
| What is alternating current? |
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Definition
| The individual electrons actually oscillate or "Vibrate" back and forth. Example: Generators. |
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Term
| Electrostatic force is _____ proportional to the distance between charges and ____ proportional to the product of the charges. |
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Definition
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Term
| The charges on an object are distributed how? |
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Definition
| evenly throughout the object |
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| On the surface on an electrified object, the charges concentrate |
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Definition
| On the sharpest curvature |
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Term
| What is the unit of electric potential? |
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Definition
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| What is the unit of electrical current? |
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Definition
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Term
| What is the unit of electrical resistance? |
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Definition
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| If the distance between two UNLIKE charges is doubled, The force of attraction is |
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Definition
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| The distance between two LIKE charges is cut in half. The force of repulsion is |
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Definition
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Term
What is the relationship between current and potential difference?
What is this relationship Called? |
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Definition
they're directly proportional
Ohms Law |
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Term
| What is the formula for Ohms Law |
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Definition
| V=RI where R is in units Ohms |
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Term
| All moving electric charges develop |
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Definition
| Magnetic fields around them |
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Term
| If the charged particle spins counterclockwise the North pole will point |
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Definition
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Term
| If the charged particle spin clockwise the North pole will point |
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Definition
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Term
| The direction of spin determines the orientation of the magnetic field, this is called: |
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Definition
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Term
| Regions in which the atoms tend to line up their magnetic dipoles is called: |
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Definition
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Term
| An entire atom with a magnetic field is a: |
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Definition
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Term
Easily magnetized-high permeability Ex: Iron
Permanent magnets are made of this |
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Definition
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Term
| Weakly repelled by a magnet |
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Definition
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Term
Slightly attracted by a magnet- low permeability
Has a High retentivity |
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Definition
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Term
| A materials ability to be magnetized or demagnetized |
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Definition
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Term
| The ability to stay magnetized or to be UN-magnetized |
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Definition
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Term
| Permeability and retentivity are_____ proportional |
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Definition
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Term
| The unit of measure for the strength of a magnetic field |
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Definition
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Term
| A magnetic field is creted when they get close to each other and become Influenced by a strong charge is called: |
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Definition
| Electromagnetic Induction |
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Term
| The study of fixed electrons at rest (stationary) on and in objects |
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Definition
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Term
| Two electrified objects with like electrostatic charges _____each other |
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Definition
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Term
| Electrostatic force is measured in units of |
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Definition
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Term
| What is the effect on electrostatic force of either repulsion or attraction between two objects when the distnance between them increases |
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Definition
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Term
| Where do electric charges distribute in material that is a conductor of electricity |
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Definition
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Term
| Electrification done when one object rubs against another object |
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Definition
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Term
| When two object touch one another permitting electrons to move to the other |
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Definition
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Term
| Electric fields act on one another without contact. Influence |
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Definition
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Term
| The study of electrons moving through a conductor such as a copper wire is termed |
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Definition
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Term
| The actual flow of electrons in a conductor: |
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Definition
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Term
| Property of an element in a circuit that resists or impedes the flow of electricity |
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Definition
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Term
| electrostatic force between 2 properties is _______ proportional to the product |
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Definition
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Term
| Electrostatic force is ________proportional to the square distance |
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Definition
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Term
| Two negatively charged objects will have an electrostatic force of |
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Definition
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Term
| Electrons will flow in a circuit that is |
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Definition
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Term
| The term for matter that allows electrons to easily flow with very little resistance |
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Definition
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Term
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Definition
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Term
| term for the unit used to measure electric power |
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Definition
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Term
| Magnetic flux lines outside a magnet have a direction of |
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Definition
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Term
| The ends of a magnet are referred to as |
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Definition
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Term
| Magnetic like poles _______, magnetic opposite poles _______ |
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Definition
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Term
| What are the three types of magnets |
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Definition
| natural, permanent, temporary |
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Term
| The type of magnet that earth and lodestones (magnetite) are |
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Definition
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Term
| Temporary magnets produced with an iron core wrapped with wire carrying electric current |
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Definition
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Term
| Lines of magnetic flux traveling in the same direction will attract each other. true or false |
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Definition
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Term
| Tapping an iron bar against a solid object in a magnetic field will help magnetize that material. true or false |
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Definition
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Term
| Magnetic poles can exist separately from each other and may have only one pole. true or false |
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Definition
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Term
| According to the laws of magnetism, how many poles will an atomic magnet have? |
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Definition
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Term
| Magnetic flux lines Inside a magnet have a direction of |
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Definition
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Term
| In the US how often does AC current go through a complete cycle? |
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Definition
| 1/60th of a sec+ 1 full cycle |
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Term
| What waveform represents AC current? |
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Definition
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Term
| What are examples of insulator? |
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Definition
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Term
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Definition
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Term
| What does a circuit breaker do? |
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Definition
| Protects equipment from damage |
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Term
| Magnetic lines that surround a magnet are called: |
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Definition
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Term
| Electromagnetic force is the same as: |
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Definition
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Term
| What are the 3 magnetic laws? |
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Definition
| Repulsion, Inverse square law, Magnetic poles |
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Term
| If you have high permeability you have____ retentivity |
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Definition
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Term
| What are 3 properties of electrodynamics? |
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Definition
| Potential difference, Current, Resistance |
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Term
| When distance increases, force of attraction will_____? |
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Definition
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Term
| What factors effect resistance of a conductor? |
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Definition
Diameter-Bigger, less resistance
Length- Longer, More resistance
Temperature. |
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Term
| Conductor- increase temp, ______ flow |
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Definition
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Term
| Semiconductor- increase temp, ______ flow? |
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Definition
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Term
| Insulator- Increase temp,______ flow? |
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Definition
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Term
| 1 electron in the outer shell is the best conductor? True/False |
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Definition
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Term
| Inhibits flow, No free movement of electrons, Charge remains localized |
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Definition
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Term
| Charges reside on outer surface, allows electrons to move freely/easily, usually made of metal |
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Definition
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