Term
| The first electrical potential came from what? |
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Definition
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Term
| What are the battery parts? |
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Definition
| Electrolytes (acid) and electrodes (metals) |
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Term
| What types of energy are there? |
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Definition
| potential (energy) and kinetic (moving) |
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Term
| How do you measure electrical potential energy? |
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Definition
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Term
| What are other sources of energy? |
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Definition
i) Friction- result in a small version of lightning
ii) Piezoelectric crystals- ex BBQ lighters
iii) Photo- electrochemical cells (solar panels)
iv) Thermocouple- heat energy converted to electric energy
Generators- large producers of a lot of electricity |
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Term
| How does electrical current work? |
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Definition
-movement of electrons
-certain period of time
-closed electric circuit
i) Source (ex. Battery, plug…)
ii) conductor (wire)
iii) load (Ex light bulb, motor, etc.)
iv) Switch (on or off) |
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Term
| What do you use to measure current? |
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Definition
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Term
| How do you figure out the current |
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Definition
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Term
| What is one amp equal to? |
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Definition
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Term
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Definition
-Series is one path for electrons
-Parallel has multiple paths for electrons |
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Term
| How do you increase resistance? |
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Definition
-add resistors to a circuit in series
-take out parallel resistors |
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Term
| How do you decrease resistance? |
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Definition
-add resistors in parallel
-take out series resistors |
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Term
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Definition
| Change in energy over a period of time? |
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Term
| What do companies use to calculate cost? (for electricity) |
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Definition
| kilowatts, rather than joules. |
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Term
| How many stars are there to be estimated in our galaxy? |
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Definition
| 100 billion stars are estimated in our galaxy alone |
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Term
| How many galaxies are there estimated to be? |
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Definition
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Term
| What galaxy do we live in? |
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Definition
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Term
| Chemicals break down to ions, which allows what? |
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Definition
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Term
| What different charges are there? |
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Definition
| positive, negative, neutral |
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Term
| What are the electron levels in each charge? |
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Definition
Positive- lack of electrons
Negative- buildup of electrons
Neutral- equal amount |
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Term
| What are methods of forming static electricity? |
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Definition
i) friction
ii) positive: amber loses electrons
iii) negative: acetate gains electrons |
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Term
| Ways of transfering electrons |
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Definition
i) conductors (metals) -electrons move well
ii) insulators (glass, wood, rubber) -electrons do not move well
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Term
How do you measure electric charge?
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Definition
with coulombs (C)
-1 coulomb= 6.25 x 1018 electrons
-lightning can carry 5-25 coulombs |
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Term
| Different applications of static electricity are... |
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Definition
i) plastic wrap
ii) photo copier |
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Term
| Dangers of static electricity are... |
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Definition
i) electrocution (short circuit)
-avoid by grounding
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Term
| What is an electric force? |
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Definition
| push or pull between charged objects (think of magnetic devices) |
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Term
| What types of electric forces? |
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Definition
| opposite charges repel, same charges attract, neutral do nothing |
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Term
| Ways of charging objects are... |
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Definition
i) conduction- touching (transfers electrons)
ii) induction - no touching |
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