In a generator, an outside source of mechanical motion supplies the energy to move a magnet in a magnetic field. A generator works just like the moving magnet in a magnetic field (as in Part II). Click on Show Field and observe the moving magnetic field Results Results Changing Results Changing Changing Results Changing Summary: Lenz's Law states that the induced EMF opposes the change in the magnetic field. Imagine you were actually turning the water wheel by hand to generate current. Would the wheel resist motion? As you worked harder at moving the wheel, you would expect the light to shine Explain what is happening in the simulation's generator and in Hoover Dam in terms of the law of conservation of energy. Faraday's Law can be summarized with the formula: emf = NABO You investigated cach of the variables that has an effect on emf (electromotive force, like potential or voltage). List what cach variable is and how it affects emf emf - potential to drive electrons in a current N- A- B- Finally, transformers use the ratio of the number of loops in the primary (input) coil to the loops in secondary (ouput) coil to determine the step, or what will happen to the voltage (emf) in the system. A transformer with 500 loops in the primary and 1000 loops in the secondary is a 2:1 step-up transformer that will double the input voltage. Is this free energy or does something have to stepped down?