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  • Question
  • What Benjamin Franklin invented?


  • Options
  • A. Bifocal spectacles
  • B. Radio
  • C. Barometer
  • D. Hygrometer

  • Correct Answer
  • Bifocal spectacles 

    Explanation
    Invented in 1760.

    A list of Benjamin Franklin's inventions reveals a man of many talents and interests. It was the scientist in Ben that brought out the inventor. His natural curiosity about things and the way they work made him try to find ways to make them work better.

    Ben had poor vision and needed glasses to read. He got tired of constantly taking them off and putting them back on, so he decided to figure out a way to make his glasses let him see both near and far. He had two pairs of spectacles cut in half and put half of each lens in a single frame. Today, we call them bifocals.

  • More questions

    • 1. The mean surface temperature of the sun is estimated to be of the prder of

    • Options
    • A. 5500?C
    • B. 4000?C
    • C. 2000?C
    • D. 1000?C
    • Discuss
    • 2. The Pyrenees mountains are located on the border between ____ and ____

    • Options
    • A. Romania, Bulgaria
    • B. Norway, Sweden
    • C. Hungary, Romania
    • D. France, Spain
    • Discuss
    • 3. What is the relationship between resistivity r and conductivity s?

    • Options
    • A. R = s2
    • B. R = s
    • C. R > s
    • D. R = 1/s
    • Discuss
    • 4. Which of the following is used as a lubricant?

    • Options
    • A. Graphite
    • B. Silica
    • C. Iron Oxide
    • D. Diamond
    • Discuss
    • 5. Fenway Park is the home field of what Major League Baseball team?

    • Options
    • A. New York Yankees
    • B. Chicago White Sox
    • C. Montreal Expos
    • D. Boston Red Sox
    • Discuss
    • 6. The religion of Afghanistan is

    • Options
    • A. Islam
    • B. Buddhism
    • C. Hinduism
    • D. Christianity
    • Discuss
    • 7. Who was the first Indian woman to win a medal in the Olympics?

    • Options
    • A. P.T.Usha
    • B. Karnam Malleshwari
    • C. Kunjarani Devi
    • D. Bachendri Pal
    • Discuss
    • 8. Who is known as 'Desert Fox'?

    • Options
    • A. Bismarck
    • B. Eisenhower
    • C. Gen. Rommel
    • D. Walter Scott
    • Discuss
    • 9. The letters, "DOS" stand for...

    • Options
    • A. Data Out System
    • B. Disk Out System
    • C. Disk Operating System
    • D. Data Operating System
    • Discuss
    • 10. Which of the following countries is not a member of SAARC?

    • Options
    • A. Nepal
    • B. Bangladesh
    • C. Afghanistan
    • D. Myanmar
    • Discuss


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