Physics Inventions — Set 1
Inventions · भौतिकी के आविष्कार · Questions 1–10 of 70
Who is credited with the invention of the barometer used to measure atmospheric pressure?
Correct Answer: A. Evangelista Torricelli
Evangelista Torricelli invented the mercury barometer in 1643. He was a student of Galileo and sought to explain the vacuum. This device laid the foundation for modern meteorology.
The first practical telephone was patented by which inventor in 1876?
Correct Answer: C. Alexander Graham Bell
Alexander Graham Bell received the first U.S. patent for the telephone. His invention revolutionized global communication by transmitting sound over wires. The first words spoken were to his assistant, Mr. Watson.
Which scientist is known for inventing the lightning rod to protect buildings?
Correct Answer: C. Benjamin Franklin
Benjamin Franklin invented the lightning rod after his famous kite experiment. It provides a low-resistance path for lightning to reach the ground safely. He refused to patent the invention to benefit the public.
Who invented the first alternating current (AC) motor, which is widely used in industrial applications?
Correct Answer: A. Nikola Tesla
Nikola Tesla developed the AC induction motor in the late 1880s. This invention allowed for efficient long-distance power transmission. He eventually partnered with George Westinghouse to commercialize AC power.
The invention of the steam engine was significantly improved for commercial use by whom?
Correct Answer: A. James Watt
James Watt improved the Newcomen steam engine by adding a separate condenser. This modification greatly increased fuel efficiency and power output. His work fueled the progress of the Industrial Revolution.
Who is the inventor of the wireless telegraphy system, leading to the development of radio?
Correct Answer: D. Guglielmo Marconi
Guglielmo Marconi developed the first successful long-distance wireless telegraph system. He sent the first transatlantic radio signal in 1901. He shared the 1909 Nobel Prize in Physics for this work.
The first functioning laser was built by which physicist in 1960?
Correct Answer: C. Theodore Maiman
Theodore Maiman operated the first working laser using a synthetic ruby crystal. It produced a concentrated beam of coherent monochromatic light. Laser technology is now vital in medicine, industry, and telecommunications.
Who invented the thermometer scale where water freezes at 32 degrees and boils at 212 degrees?
Correct Answer: C. Daniel Gabriel Fahrenheit
Daniel Gabriel Fahrenheit proposed this temperature scale in 1724. He was the first to use mercury instead of alcohol in thermometers. This scale is still commonly used in the United States today.
Which inventor developed the first successful incandescent light bulb with a carbon filament?
Correct Answer: D. Thomas Edison
Thomas Edison created a long-lasting light bulb in 1879 after testing thousands of materials. He also developed the entire electrical system to support home lighting. His laboratory at Menlo Park became a model for modern R&D.
Who invented the first battery, known as the 'Voltaic Pile'?
Correct Answer: C. Alessandro Volta
Alessandro Volta created the first chemical battery in 1800. It consisted of alternating discs of zinc and copper separated by brine-soaked cardboard. The unit of electric potential, the volt, is named in his honor.