Term
| The motion of charges in wires, motors, light bulbs and other devices is best called: |
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Definition
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Definition
| Uses symbols to represent each part of the circuit, can be interpreted by anyone, and makes drawing easier |
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Definition
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| Name two devices used to measure current |
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| Two devices that protect circuits from overloading |
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Definition
| Circuit breakers and fuses |
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Definition
| The relationship between current, voltage, and the resistance |
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Term
| When more devices are added to a series circuit, the total resistance _________ |
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Term
| As you add more light bulbs in a series circuit, the light bulbs become ______________ |
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| The voltage is the same in what kind of circuit? |
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Term
| What is the same everywhere in a series circuit? |
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Term
| Adding a new branch to a parallel circuit _______________ the resistance of the circuit |
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Definition
| Only one pathway for the electrical current to travel through |
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Definition
| More than one pathway for the electrical current to travel through |
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Term
| Houses are wired in __________________ |
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Definition
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Term
| What is this? All current flowing into a branch point must exit again |
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Definition
| Kirchhoff's Law (for parallel circuits) |
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Term
| Energy from an electrical company is bought in ______________ |
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Definition
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Term
| The direction of current is DEFINED as going from _____ to _____ |
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Definition
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Term
| Where do electrons come from besides the battery? |
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Definition
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| Describe an insulator's electrons. |
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Definition
| They are tightly bound and fixed in place |
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Definition
| A device that stores electrical energy |
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Term
| Cut a bar magnet in half and what happens? |
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Definition
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Term
| What do like poles in a magnet do if they touch? |
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Definition
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Term
| Where are magnetic field lines strongest at? |
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Definition
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Term
| When are magnetic fields created? |
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Definition
| When current pases through a wire. |
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Term
| How do you demagnetize a permanent magnet? |
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Definition
| Messing up the alignment of its magnetic field's domains |
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Term
| List three ways to increase the strength of an electromagnet |
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Definition
1) Wrap the wire around an iron core
2) Increase the number of coils
3) Add more voltage (add batteries) |
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Term
| What will a compass needle do when placed next to a wire containing current? |
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Definition
| It will line up with the direction of the current |
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Definition
| This switches the electromagnets from north to south and back again on an electric motor |
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Definition
| Electrical energy to mechanical energy |
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Term
| What does an electric generator produce? |
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Definition
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Term
| Define Electromagnetic Induction |
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Definition
| When current is induced in a wire by a moving magnet |
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Definition
| Mechanical energy to electrical energy |
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Term
| What happens to the strength of the field when you get farther away from it? |
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Definition
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Term
| What creates an electric field? |
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Definition
| The friction of charged particles |
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