Inventions — Set 5
Physics · आविष्कार · Questions 41–50 of 60
The first practical steam locomotive was built by?
Correct Answer: A. Richard Trevithick
Richard Trevithick built the first working steam locomotive to run on rails in 1804. George Stephenson later perfected the design and built the famous 'Rocket' locomotive. This technology enabled the growth of the global railway network for transportation.
Who invented the first artificial heart successfully implanted in a human?
Correct Answer: D. Robert Jarvik
Robert Jarvik designed the Jarvik-7, which was the first permanent artificial heart used in surgery. It was powered by an external compressor and kept patients alive for several months. The first recipient, Barney Clark, survived for 112 days after the procedure.
The invention of the stethoscope is credited to which French physician?
Correct Answer: C. Rene Laennec
Rene Laennec invented the stethoscope because he felt uncomfortable placing his ear on a patient's chest. His first version was a simple wooden tube used to amplify internal sounds. This tool became essential for diagnosing heart and lung conditions in medicine.
Who developed the first successful polio vaccine using an inactivated virus?
Correct Answer: C. Jonas Salk
Jonas Salk developed the injectable polio vaccine in the early 1950s using killed virus. He chose not to patent the vaccine to ensure it remained affordable and accessible. His work led to the near-eradication of polio in many parts of the world.
Which scientist is known for inventing the carbon microphone used in early telephones?
Correct Answer: D. David Edward Hughes
David Edward Hughes invented the carbon microphone, which significantly improved sound quality in telephony. It worked by varying the resistance of carbon granules in response to sound waves. This technology was also crucial for the development of early radio broadcasting.
The invention of the refrigerator for home use was made possible by the work of?
Correct Answer: B. Carl von Linde
Carl von Linde developed a process for liquefying gases that paved the way for refrigeration. His work led to the first reliable industrial and domestic cooling systems using ammonia. Refrigeration transformed the global food industry by allowing long-term storage and transport.
Who invented the first practical radar system used for detecting aircraft?
Correct Answer: C. Robert Watson-Watt
Robert Watson-Watt developed the 'Chain Home' radar system to detect incoming enemy planes. It uses radio waves to determine the range, angle, and velocity of distant objects. Radar remains a critical technology for aviation, meteorology, and military defense systems.
The invention of the hoverboard (self-balancing scooter) is often linked to?
Correct Answer: C. Shane Chen
Shane Chen invented the self-balancing board, commonly known as the hoverboard, in 2013. It uses gyroscopes and sensors to maintain balance while the rider leans to steer. Dean Kamen invented the larger Segway scooter using similar balancing technology earlier.
Who is credited with inventing the first mechanical television?
Correct Answer: B. John Logie Baird
John Logie Baird demonstrated the first working television system using a mechanical rotating disc. His system was able to transmit moving grayscale images over a short distance. Electronic television, developed later by Philo Farnsworth, eventually replaced the mechanical version.
The invention of the GPS (Global Positioning System) was developed by?
Correct Answer: C. The US Department of Defense
The US Department of Defense developed GPS originally for military navigation and tracking. It uses a network of satellites to provide precise location and time information anywhere on Earth. Today, GPS is a vital utility for civilian navigation, mapping, and telecommunications.