Transformers are used to step-up (increase) or step-down (decrease) voltage. They are extremely important in our everyday lives. They are used to step-up voltage at a power generating station so that electricity can travel long distances with very little energy loss (low current flow) to your neighbourhood and then is stepped back down so you can use it in your home at safe voltages and high current. They are used in your cell-phone and computer chargers as well - look at the back and you'll see. But...how do they work? Instructions
The following three downloads are in the package you were given in class, but are also available for download below.
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