Everyday Inventions — Set 5

Correct Answer: D. Wilhelm Roentgen

Wilhelm Roentgen discovered X-rays in 1895 while experimenting with cathode rays. He took the first medical X-ray of his wife's hand, revealing her bones and ring. He was awarded the first-ever Nobel Prize in Physics for this monumental discovery.

Correct Answer: C. Blaise Pascal

Blaise Pascal built the calculator in 1642 to help his father with tax accounting work. It could perform addition and subtraction directly using a series of gears and wheels. It was one of the first devices to prove that mathematical tasks could be mechanized.

Correct Answer: C. Montgolfier Brothers

Joseph-Michel and Jacques-Etienne Montgolfier launched the first manned balloon flight in Paris. They used smoke and hot air from a fire to provide the necessary buoyancy. This was the first time humans traveled through the air successfully.

Correct Answer: D. Hans von Ohain

Hans von Ohain designed the first operational turbojet engine that powered the Heinkel He 178. Simultaneously, Frank Whittle was developing a similar engine in Great Britain. Jet engines allowed aircraft to fly much faster and higher than propeller planes.

Correct Answer: B. George Beauchamp

George Beauchamp and Adolph Rickenbacker created the 'Frying Pan' guitar using magnetic pickups. This allowed the sound of the guitar to be amplified to match the volume of big bands. It laid the foundation for modern rock and roll music.

Correct Answer: D. Elias Howe

Elias Howe patented the first practical lockstitch sewing machine in 1846. His design used a needle with an eye at the point and a shuttle to create a strong stitch. Although Singer later improved the marketing, Howe's mechanical concept was the core innovation.

Correct Answer: A. John Harrison

John Harrison spent decades developing a clock that could keep accurate time despite the motion of a ship. This solved the 'Longitude Problem' and made ocean navigation significantly safer. His H4 chronometer was a masterpiece of precision engineering.

Correct Answer: D. Michael Faraday

Michael Faraday demonstrated electromagnetic rotation using a wire, a magnet, and a battery in 1821. This was the first device to convert electrical energy into mechanical motion. His discovery is the basis for all modern electric motors and generators.

Correct Answer: C. James Ritty

James Ritty invented the 'Incorruptible Cashier' to prevent his employees from stealing profits at his saloon. The design was later bought by John Patterson, who founded the National Cash Register (NCR) company. It revolutionized retail business by tracking sales accurately.

Correct Answer: A. Lewis Waterman

Lewis Waterman improved the ink flow by using a capillary feed system. This prevented the pen from leaking or blotting ink onto the paper. It became the standard writing instrument before the ballpoint pen.