Physics Inventions — Set 5
Inventions · भौतिकी के आविष्कार · Questions 41–50 of 70
Which inventor developed the first mechanical computer, the 'Difference Engine'?
Correct Answer: C. Charles Babbage
Charles Babbage is often called the 'Father of the Computer'. He designed complex machines intended to calculate mathematical tables automatically. His 'Analytical Engine' design contained all the essential elements of a modern computer.
The first modern fountain pen was patented by?
Correct Answer: C. Lewis Waterman
Lewis Waterman developed the 'Ideal' fountain pen in 1884. He used a capillary feed system to ensure a steady flow of ink. This invention solved the problem of pens leaking and blotching paper.
Who is the inventor of the microphone used in early telephones?
Correct Answer: A. Thomas Edison
Thomas Edison invented the carbon microphone, which greatly improved telephone sound quality. This technology was also used in early radio broadcasting and public address systems. His design remained the standard for many decades.
The parachute was first successfully demonstrated in a jump from a hot air balloon by?
Correct Answer: D. André-Jacques Garnerin
André-Jacques Garnerin performed the first high-altitude jump in Paris in 1797. He used a frameless parachute that looked like a large umbrella. His wife later became the first female parachutist in history.
Who invented the first portable battery-powered hearing aid?
Correct Answer: C. Miller Reese Hutchison
Miller Reese Hutchison invented the 'Acousticon' in 1902. It was the first commercially successful electric hearing aid. He was also a prolific inventor who worked closely with Thomas Edison.
The first solar cell was created by which inventor in 1883?
Correct Answer: B. Charles Fritts
Charles Fritts built the first solid-state photovoltaic cell using selenium. Though it had low efficiency, it proved light could be directly converted into electricity. Modern solar panels are descendants of this early breakthrough.
Who invented the first practical submarine intended for war, called the 'Nautilus'?
Correct Answer: C. Robert Fulton
Robert Fulton designed the Nautilus in 1800 for Napoleon Bonaparte. It featured a dual propulsion system: a sail for surface and a hand-cranked screw for underwater. Fulton is also famous for inventing the first commercially successful steamboat.
The first microwave oven was invented accidentally by which engineer?
Correct Answer: A. Percy Spencer
Percy Spencer noticed a candy bar melted in his pocket while working on radar magnetrons. He realized microwave energy could cook food rapidly. The first commercial unit was called the 'Radarange'.
Who is credited with the invention of the electric stove in 1892?
Correct Answer: C. Thomas Ahearn
Thomas Ahearn, a Canadian inventor, installed the first electric stove in a hotel. It used iron plates heated by electricity to cook food. It took several decades for electric stoves to replace gas models in homes.
The inventor of the first world-famous diesel engine was?
Correct Answer: B. Rudolf Diesel
Rudolf Diesel developed a high-efficiency internal combustion engine that used compression ignition. He sought a more powerful alternative to the steam engine. Diesel engines are now standard for heavy vehicles and power generation.