# Electricity and Magnetism

### 44 terms by peppermint9012

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### What is electricity?

matter with an electric charge

atoms

charged

### Insulators

hold electrons tightly

### Examples of Insulators

Rubber, plastic, wood, glass, dry air

### Conductors

allow electrons to flow

metal and water

repeal

attract

### Definition of Static Electricity

The imbalence of positive and negative charges

### Characteristics of Static electricity

Results from the movement of electrons; affected by the material; after discharge does not flow; the shock is from the fast movement of electrons (causes warming of air)

### Examples of Static Electricity

Slides, trampolines, lightening, clinging laundry, doorknob shock

### Not an Example of Static Electricity

Electricity that flows in an outlet

### Lightening is

a large discharge of static electricity

### Lightening is caused by

friction of the movement of water droplets in a cloud build up areas of (+) and (-) charges

### Lightening bolt occurs when

billions of electrons are transfered at the same rate

### The heat from the bolt causes

the air around it to expand rapidly to produce compression waves (thunder)

### What do lightening rods do?

they ground the charge

the earth

### Electroscope

a device you can use to determine the charge of an object as well as the magnitude of the charge

### Current electricity is made by

generators (gathers electrons)

conductor

### Direct Current

electrons flow in the same direction all the time

Flashlight

### Alternating current

electrons flow changes directions

### Def. of circuit

the path taken by the electric current

closed

### Parts of a Circuit

Source of electricity, conductor (wire), load (resistor), switch (optional)

### Series circuit

a single current flows through the path and all devices connected to the path

Flashlight

### When more resistors are added to the series circuit the overall current with the circuit ----- (resistance ----)

decreases increases

### Parallel Circuit

as the number of resistors increases the overall current stays the same

the rest stay on

electric current

### Volts measures

amount of push a source of electricity gives

### Watt measures

how much energy something uses

### Ammeter

used to measure current

### Magnetism

a property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles

### Magnets are attracted to

iron and metals the contain iron

### Magnetic Field

a region around a magnet where magnetic forces act

magnetic field

### Electromagnet

a strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current through the coil

stronger

### Flickr Creative Commons Images

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