Term
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Definition
| disturbances in air pressure |
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Term
| how many particles are in an atom |
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Definition
| 3 (protons,electrons,and neutrons) |
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Term
|
Definition
| a flow of electrons between atoms |
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Term
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Definition
| they allow for a smooth flow of charged particles |
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Term
| What are the two main types of electricity |
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Definition
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Term
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Definition
-He supported AC as electrical standard
-makes the first AC car motor |
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Term
|
Definition
-He supported DC as electrical standard
-he tried to scare the public from AC |
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Term
| When does AC finally beat DC |
|
Definition
| when the Niagra Falls plant opens in 1896 |
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Term
| What are the characteristics of AC(Alternating Current) |
|
Definition
-flows in two directions
-used for distribution
-cycles at 60Hz
-60Hz is best carrier of electricity
-easy to transform voltages |
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|
Term
| What are the characteristics of DC(Direct Current) |
|
Definition
-flows in 1 direction
-used in electronics(ex. batteries) |
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Term
|
Definition
| moving magnetic field past metal creates voltage |
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|
Term
| how are magnetic fields created |
|
Definition
| with electricity sent through metal wire |
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Term
| What do dynamos consist of |
|
Definition
| massive rotating copper wire coils housed with big magnets |
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Term
|
Definition
-permanent(artificial or natural)
-has electromagnets(used to make power) |
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Term
| What is electrical generation |
|
Definition
| the rotation of magnetic fields past coils |
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
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Term
|
Definition
| an unbroken path to produce work |
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Term
| what are the components of a circuit |
|
Definition
-LEDs(light emitting diode)
-transformers
-capacitors
-resistors
-transistors
-transducers |
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Term
| what are LEDs(light emitting diodes) |
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Definition
|
|
Term
| what does a transformer do |
|
Definition
|
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Term
|
Definition
| store and supplement energy |
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Term
|
Definition
| restrict the flow of electrons |
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Term
| what does a transistor do |
|
Definition
| amplifies,detects or switches |
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Term
|
Definition
devices that convert forms of energy for example:
-mics
-speakers
-playback head on tapedecks
-tv's
-phonograph needles |
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Term
|
Definition
| the different pressure existing between 2 points |
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Term
|
Definition
| the measure of electrical current a material will recieve |
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Term
| what are characteristics of a condenser microphone |
|
Definition
-two oppositely charged plates
-requires phantom power
-wide range frequency
-expensive
-fragile |
|
|
Term
| what are characteristics of a dynamic microphone |
|
Definition
-wire coil moving in a magnetic field which induces audio signal
-can handle a high SPL
-inexpensive
-tough |
|
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Term
| electrons have what kind of charge |
|
Definition
|
|
Term
| protons have what type of charge |
|
Definition
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|
Term
| natural magnets are found in the earth and are formally known as what |
|
Definition
|
|
Term
| what particles reside in an atoms nucleus |
|
Definition
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|
Term
| a magnetic field will attract what kind of charge |
|
Definition
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|
Term
| a magnetic field will repel what kind of charge |
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Definition
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|
Term
| a stream of moving electrons is referred to as what |
|
Definition
|
|
Term
| what current is easier to mass produce |
|
Definition
|
|
Term
| what circuit component is used to step AC voltage up or down |
|
Definition
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|
Term
| light can only be detected on its interactions with what |
|
Definition
|
|
Term
| light can be characterized by what |
|
Definition
|
|
Term
|
Definition
| stray energy particles absorbed by atoms |
|
|
Term
| at what speed does light travel |
|
Definition
|
|
Term
| who was the first to closely calculate the speed of light |
|
Definition
|
|
Term
| What is the additive color theory |
|
Definition
-consist of the colors red,green and blue
-if overlapped you have a white spot |
|
|
Term
| what is the subtractive color theory |
|
Definition
-consist of the colors cyan, magenta and yellow
-if overlapped you have a black spot |
|
|
Term
| Who predicted wireless communication |
|
Definition
|
|
Term
| Who was the first commercial radio station |
|
Definition
|
|
Term
|
Definition
-amplitude modulation
-supports of thousands of cycles
-580KHz=580,000 |
|
|
Term
|
Definition
-frequency modulation
-millions of cycles
-95MHz=95,000,000 |
|
|
Term
| what is the characteristics of Visible light |
|
Definition
-the smallest part of the spectrum
-dominant wavelength is called Hue(think ROY G BIV)
-all colors=white
-no colors=black |
|
|
Term
|
Definition
-the amount of light concentrated at a wavelenth
-as you increase frequency the light changes color
-as you increase amplitude the light changes brightness |
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|
Term
| who invented the heliograph |
|
Definition
-Joseph Niepce
-long exposure time(8hrs)
-no copies |
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