Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
M. & E.
Magnetism and Electricity
| Question | Answer |
|---|---|
| Nucleus holds what? | protons and neutrons |
| Outside of nucleus is made up of what? | electrons that carry a negative charge |
| Magnetic fields that are aligned | magnetic domain |
| When all or most magnetic domains are arranged in the same direction, what happens to the material? | magnetized material |
| What are most magnets made of? | not completely iron, most= many different materials, called alloys/ferrite materials |
| Why does dropping a magnet de-magnetize it? | it scatters the domains |
| Temporary Magnet | easy to magnetize, easy to lose magnetism |
| Permanent Magnet | hard to magnetize, stay magnetized for a long time |
| What destroys magnetism because it scatters the domains? | heat |
| Proton's charge is... | positive |
| Electron's charge is... | negative |
| Neutron's charge is... | neutral (no charge) |
| Same number of protons and electrons= | neutral charge |
| Static electricity | the buildup of electric charges on an object |
| Static discharge | allows the object to become neutral again (excess charge is neutralized by a flow of charges from the object to the surroundings) |
| Opposite charges what? | attract |
| Like charges what? | repel |
| Electric force between two objects depends on what two things? | Distance between two objects and the amount of charge on each object |
| Electric field= | area around every electric charge |
| Conductor | allows the flow of electrons |
| Insulator | resists the flow of electrons |
| Grounding | Provides a path for electric charges to move to Earth's surface |
| Current | the net movement of electric charges in one direction |
| when electrons move in all different directions | there is no current |
| Current is measured in | amperes (measure the amount of electrons flowing past one point) |
| Voltage | the electric force behind charges that make them move |
| Electric charge flows from ? to ? voltage | higher; lower |
| An electric circuit must have a ? path to follow | closed, loop-like |
| Unclosed path= | stopped current |
| A circuit needs a ? to keep moving | voltage difference |
| Batteries provide? | voltage difference |
| Electric outlet voltage difference vs. battery voltage difference | EO is greater |
| First battery was called what? | The Voltaic Pile |
| First battery made by whom? | Alessandro Volta |
| Electrochemical Cell | two types of metal, acid in between to generate electric current |
| Resistance turns electricity into what? | Light and heat |
| Resistance is measured in ? | Ohms |
| ?, ? and ? affect resistance? | Temperature, length and thickness of material |
| Longer and thinner wire= | more resistance |
| 3 Main parts of a simple circuit | source of voltage difference, device with resistance, and conductors |
| DC | Direct Current |
| AC | Alternating Current |
| DC does what? | goes in one direction at a constant voltage |
| AC does what? | reverses direction every so often, voltage goes from zero to maximum value, minimum value, and repeats |
| AC= what kind of wave? | sinusoidal (sine) |
| War of Currents between? | Tesla and Edison |
| Tesla believed in? | DC |
| Edison believed in? | AC |
| Electromagnets | the interaction between electricity and magnets |
| Solenoid | magnetic field caused by electric current passing through a coil of wire |
| Solenoid is used in what? | doorbells |
| Electromagnets can be.. | turned on or off when needed |
| Electric Motor | apparatus that changes electrical energy into kinetic energy |
| Galvanometer | device that measures current in a wire |
| Voltmeters and Ammeters have? | Galvanometer |
| Generators | use electromagnetic induction to convert KE to electrical energy |
| Transformers | increase or decrease the voltage of an AC |
Created by:
reneslacis
Popular Physical Science sets