Environment and teaching kits

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Presentation transcript:

Environment and teaching kits Andrzej Kotlicki Physics and Astronomy

Voltage, Current, Resistance, Power R = V/I P =IV = V2/R = I2R

Multimeters Measuring voltage current resistance Precautions Current fuse – when it burns? Measure resistance outside the circuit

SOLDERLESS BREADBOARD

Breadboard (design board) connections between the holes are shown in red Use only the specified wire

Light Emitting Diodes LEDs voltage –current characteristics,

360 9V Light Emitting Diodes LEDs example circuit In principle we need a current source, very often IC direction 360 9V

Solar Panels How they work? Power – notice that both voltage and current changes with light intensity Maximum power and load

Gearbox Purpose Role in wind and water turbines. Our little crank turbine How hard it is to turn – try with incandescent bulb an LED

Light sources Incandescent Fluorescent and low voltage (12V) fluorescent LED Reasons for efficiency. Spectrum Coming ways of illuminating

Kill-a-Watt meter Use. Example with 3 kinds of lights of the same intensity

Issues with green electrical power Solar, wind and hydro Nuclear Why we use AC? What is AC The implications for the grid Global grid? DC power lines? Superconducting power lines?