To begin with, all the bulbs are lit.

On bulb fails, and all the bulbs go out.

Which bulb failed?

That bulb is replaced with a new one.

Then bulb C is unscrewed.

Which bulbs are still lit
circuit.jpg

Alessandro Volta made the first
  • Light bulb
  • Telephone
  • Battery


Who built the first electric generating machine?
  • Nikola Tesla
  • Alessandro Volta
  • Otto Von Guericke


Fill in the blank: Thales observed static electricity when he rubbed _ and wool together.
  • Iron ore
  • Amber
  • Wheat


Fill in the blank: Thomas Edison made the first _ light bulb.
  • Fluorescent
  • Incandescent
  • Strongest




If a chicken says, "All chickens are liars" is the chicken telling the truth?