How Circuits Work" Have you ever wondered what happens when you flip a switch to turn on a light, TV, vacuum cleaner or computer? What does flipping that switch accomplish? In all of these cases, you are completing an electric circuit, allowing a current, or flow of electrons, through the wires. An electric circuit is in many ways similar to your circulatory system. Your blood vessels, arteries, veins and capillaries are like the wires in a circuit. The blood vessels carry the flow of blood through your body. Your heart is the pump that drives the blood circulation in the body. Take the simple case of an electric light. The diagram above shows a simple circuit of a flashlight with a battery at one end and a flashlight bulb at the other end. Circuits can be huge power systems transmitting megawatts of power over a thousand miles -- or tiny microelectronic chips containing millions of transistors. In this article, we'll learn about the two basic types of electric circuits:
Electrcity: History & Science © Matthew Modoono Indoor bolts produced by the world's largest air-insulated Van de Graaff generator spark exciting explorations of lightning, conductors, insulators, electricity, magnetism, and storm safety. Seating is first come, first served. Now Showing Schedule Approximately 20 minutes long See schedule Location Theater of Electricity Find on map Recommended for Grades 3 – 12 and adults Free with Exhibit Halls admission Accessibility: American Sign Language Interpretation Available Upon RequestAssistive Listening Devices Available At Information DeskWheelchair Accessible States of Matter Topics Atomic Bonding Interaction Potential States of Matter Dipole Description Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time. Sample Learning Goals Describe a molecular model for solids, liquids, and gases.Extend this model to phase changes.Describe how heating or cooling changes the behavior of the molecules.Describe how changing the volume can affect temperature, pressure, and state.Relate a pressure-temperature diagram to the behavior of molecules.Interpret graphs of interatomic potential.Describe how forces on atoms relate to the interaction potential.Describe the physical meaning of the parameters in the Lennard-Jones potential, and how this relates to the molecule behavior. Version 1.2.1 HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems. iPad: iOS 12+ SafariiPad compatible sims
Zoom: Teach Online Class Sessions | IT@UMN | The people behind the technology Synchronous class sessions, in which everyone logs in to a web conferencing system at a pre-scheduled time, are one way to create engagement and foster community in your fully online courses. In a synchronous session, you use a web-conferencing software and invite all your students to join in at a pre-scheduled time. The University's web conferencing software is Zoom. Zoom can be used on laptops, desktops, tablets, smartphones, and even desk phones, giving students many ways to access the class session. In this article: Preparing for Your Zoom Meeting Zoom will work best if you make some key decisions and develop Zoom fluency before inviting students into an online meeting. Choose the best session format Zoom offers webinars and meetings. If you are in the HCC/BAA and need to attend or host a meeting that requires authentication, you are required to complete a brief training about HCC requirements in order to be able to sign in and access the meeting. Set up your hardware Setting an Agenda
Electricity Concepts - All About Circuits It was discovered centuries ago that certain types of materials would mysteriously attract one another after being rubbed together. For example: after rubbing a piece of silk against a piece of glass, the silk and glass would tend to stick together. Indeed, there was an attractive force that could be demonstrated even when the two materials were separated: Glass and silk aren't the only materials known to behave like this. Anyone who has ever brushed up against a latex balloon only to find that it tries to stick to them has experienced this same phenomenon. This phenomenon became even more interesting when it was discovered that identical materials, after having been rubbed with their respective cloths, always repelled each other: It was also noted that when a piece of glass rubbed with silk was exposed to a piece of wax rubbed with wool, the two materials would attract one another: More attention was directed toward the pieces of cloth used to do the rubbing.
Mike's Electric Stuff The Electromagnetic Spectrum - Index page The electromagnetic spectrum is more familiar to you than you might think. The microwave you use to heat your food and the cell phones you use are part of the Electromagnetic Spectrum. The light that our eyes can see is also part of the electromagnetic spectrum. This visible part of the electromagnetic spectrum consists of the colors that we see in a rainbow - from reds and oranges, through blues and purples. Each of these colors actually corresponds to a different wavelength of light. The COVID-19 online pivot The outbreak of COVID-19 has seen many universities closing campuses and shifting learning online. It’s unprecedented and suddenly puts ed tech front and centre in a way it hasn’t been before. For those of us who have been doing online learning or distance ed for a while it can seem a bit irritating to have been seen as second class for so long and then suddenly deemed worthy of interest. So I tweeted over the weekend: It’s interesting seeing all the unis that disparaged distance ed as not proper suddenly being converted to the benefits of online education— Martin Weller (@mweller) March 7, 2020 It was kinda snarky, but I’ll come to it later. So I’m seeing a lot of “oh so now online learning is where it’s at?” So, in the interest of pulling together, I’m splitting this post into two parts, the (possibly) useful bit, and the moany bit. The (possibly) useful bit It will be tough for lots of academics to teach online if they have little or no experience of it. Good luck! The moany bit
Electricity & Magnetism: Introduction Electricity is related to charges, and both electrons and protons carry a charge. The amount of the charge is the same for each particle, but opposite in sign. Electrons carry a negative charge while protons carry positive charge. The objects around us contain billions and billions of atoms, and each atom contains many protons and electrons. The protons are located in the center of the atom, concentrated in a small area called the nucleus. There aren't a lot of places that you can see electricity. It's easy to see the uses of electricity around you. Or search the sites for a specific topic. Electricity and Magnetism (NASAConnect Video)
Hobby projects - Simple electronic circuits Computer microphones Learn how to interface electret and dynamic microphones to the standard computer sound card. Metal detectors Theory of operation and schematics of the most common metal detectors used today: Very Low Frequency (VLF), Pulse Induction (PI) and Beat-Frequency Oscillator (BFO). Wireless microphone The wireless microphone transmitter can be built in an afternoon with simple, affordable and widely available parts.
How Do Solar Panels Work? share By Stephanie Chasteen and Rima Chaddha Posted 04.24.07 NOVA We've seen them for years on rooftops, atop highway warning signs, and elsewhere, but how many of us know how solar panels actually work? How do the photovoltaic cells that lie at the heart of them turn sunlight ("photo") into electricity ("voltaic")? This feature originally appeared on the site for the NOVA program Saved By the Sun. Stephanie Chasteen is a postdoctoral fellow in physics at the Exploratorium in San Francisco. Images (illustrations) © NOVA/WGBH Educational Foundation
a good basis for learning about circuits and how they work by horchard Jun 19