Have you ever been on an airplane? When airplanes move through the air, they become slightly charged. Explain how. (Airplanes must be grounded after they land so departing passengers wonâ€™t get shocked.)
When two light bulbs are connected in series, Bulb A is brighter than Bulb B. If the positions of the bulbs were reversed, which of the following is true:Â Bulb A would still be brighter or Bulb B would be brighter since it is first in the series? Explain.
An electrical motor uses the principles of electromagnetism to convert electrical energy to mechanical energy (motion). When a current-carry coil of wire is placed in a magnetic field there is a force on the wire that causes it to rotate. A generator is the reverse of a motor using electromagnetic induction to convert mechanical energy (motion) to electricity. Describe how a generator works.
There are several battery-less flashlights available now that are basically generators. One such flashlight design consists of a coil of wire and a magnet that moves up and down through the coil as you shake the flashlight to charge it. How does this work?