(Click the husky to return to the main page)
(Click here to see more pictures of her)
Episode 30 -- September 12th, 2016 -- Electricity, Magnetism, Resistance, Current, Voltage, Power
Listen to the episode 52.9 MB MP3
Neon from Lucern reminds us of a couple short announcements (via Janet Taylor). The Northshore Community Center on Country Club Drive in Lucern Tuesday night (Sept 13) potluck 5pm, meeting at 6pm. Neighborhood Watch program.
Lucerns Speaks every Thursday at 7pm. Same place.
Once per month, Open Mic (this Saturday at 7pm)
There are 2 sorts of things in the universe. Matter and Energy
Matter is stuff and Energy is force, movement, vibration
Stuff or energy that vibrates has frequency and wavelength
An Angstrum is a very tiny unit of distance (.0000000001 meters)
Electricity which is just in an amorphous blob is Static Electricity
Magnets have magnetism, Static Electricity has electrostatic energy
When you put them together, you get electromagnetics.
Everything has electric and magnetic fields.
Grounding is the act of connecting to the largest local source of electromagnetic energy, that is - the Earth.
Electric Fields and Magnetic fields are components of current electricity.
A material which conducts electricity well allows its electrons to move around and attach to different atoms.
If there are too many electrons, we say that the atoms are negatively charged ions.
If there aren't enough electrons, we say that the atoms are positively charged ions.
Wires have magnetic and electric fields, too.
A circuit is a complete connection of current flowing out of a sourcee of electricity such as a battery or an electrical outlet, through a load or device and back into the source. If the connection is broken anywhere, the flow stops.
George Ohm discovered resistance. The thickness of the wire. no resistance (zero ohms) means a perfect conductor.
Electromotive Fource is the pressure of electricity. Usually called Voltage, but abbreviated, "E".
Current is the flow rate of electricity, measured in charge per second. (Charge is measured in units called, "Culombs"
E = I x R. Voltage = Current x Resistance.
Watts of power = Voltage x Current, P (Power) = I (current) x E (Voltage).
So, if P = IE, then I = P ÷ E, E = P ÷ I.
2 or more DC voltage sources (like batteries or solar panels wired in series, have the same amount of current available, but you add up the voltages.
2 or more DC voltage sources (like batteries or solar panels wired in parallel, have the same amount of voltage available, but you add up the current available in each.
If electrons flow and have negative charge, then the opposite is the absence of electrons -flowing the other way- is hole flow. This is called, Conventional electrical flow. it is arbitrary.
Magnetic lines of force are always perpendicular to the electrical lines of force. Use the right hand rule to know which way the magnetic lines go. Using your Right hand wrap your fingers around the wire so that your thumb points to the Plus (positive side; hole or conventional flow). With your thumb pointing towards the positive, the magnetic lines of force will wrap around the wire in the direction of your fingers wrapping.
Your body should never be exposed to more than 10 milliamps of current. (0.01 Amperes). 1 Milliamp = 1/1000 Amps.
Thomas Edison was heavily involved with direct current.
Nicola Tesla was a Serbian who worked for Edison. Edison stole many of Tesla's ideas, took credit for them and got money for them.
Electrical Vibration is alternating current.
When you're talking about alternating current, there are two ways of measuring voltage. Peak, peak-to-peak and average. The wall outlet is 120 volts root-mean-squre (RMS) average. The peak-to-peak voltage is around 339 voltage, rendering the peak voltage (on just one side of the zero line) is exactly half that; 169.5 volts or so.
If I've made any mistakes, please Call me or email Kila or you can call us directly at (707) 413-6435. Here is my main website.