Electricity and Magnetism

Electricity is the movement of electric charge. It is useful for energy transfers involving electrical energy.

Static electricity is caused by the accumulation (charge at rest) of charge on the surface of the body. Current electricity is caused by the movement of charge or electrons

Conducts electricity sinceit offers little or no resistance to the flow of electrons

An insulator does not conduct electricity. An insulators a material thatresists the flow of electrons

Static buildup is when electric charges are exchanged between two surfaces that are in contact. In this process, one object takes on a positive charge and the other a negative charge. It is because of this that static electricity builds up on the surface of objects.

Photocopiers and inkjet printers use static electricity to ensure that toner sticks to the paper. Electrostatic paint spraying uses static electricity to get an even paint

Aeroplanes and rescue helicopters.

For electrons to flow continuously through a conductor, there must bea complete, unbroken path for them to move both into and out of that conductor.

Series: - components are all connected one after another - there is only one path electrons can take - Voltage of the battery is shared across all of the components and current is the same Parallel: - components are connected side to side - several paths are available to the electrons. - Voltage of the battery is the same and current is shared across all of the components

An electric current is a flow of charge.

Amps from an ammeter (A).

Law of conservation of charge says thatthe net charge of an isolated system will always remain constant.

Electrons

Voltage measures the energy carried by electrons.

Voltage and compares energy on each side of the component and shows the energy difference between 2 points.

Time and rate of doing work or delivering energy.

Power in Watts is calculated bymultiplying voltage in Volts times current in Amps. - P = VA

kWh stands for kilowatt hour (kWh) – it’s the way we measure energy in the home. total cost: total kWh x price of 1 kWh

Multiply the power rating (watts) by the amount of time (hrs) and divide by 1000.

Switch: A device that interrupts the electron flow in a circuit. Fuse: If too much current flows, the fuse wire rises to a higher temperature and melts, which opens the circuit but destroys the fuse. Circuit breakers: A type of electrical switch which heats up and cuts the power when current levels are too high.

• Always Cut the Power • Investigate Flickering Lights • Don’t Use Extension Cords Long-Term

Like sides (south and south, north and north) will repulse. Unlike sides (south and north) will attract.