Energy

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Across
  1. 1. Somewhere you put a cable
  2. 4. the light of the sun
  3. 6. electric potential or potential difference expressed in volts
  4. 7. one in which a filament gives off light when heated to incandescence by an electric current
Down
  1. 2. the flashing of light produced by a discharge of atmospheric electricity
  2. 3. a piece of equipment or a mechanism designed to serve a special purpose or perform a special function
  3. 5. a wire or wire rope by which force is exerted to control or operate a mechanism
  4. 8. any of various devices for producing light or sometimes heat