Everyday Inventions — Set 2
Inventions · रोजमर्रा के आविष्कार · Questions 11–20 of 70
The first successful radio transmission across the Atlantic Ocean was achieved by?
Correct Answer: A. Guglielmo Marconi
Guglielmo Marconi sent the first long-distance wireless signal in 1901. He utilized the electromagnetic waves discovered by Heinrich Hertz for communication purposes. This invention laid the groundwork for modern radio, television, and mobile phones.
Who invented the first modern battery, known as the 'Voltaic Pile'?
Correct Answer: B. Alessandro Volta
Alessandro Volta created the first device that could produce a steady flow of electricity in 1800. It consisted of alternating layers of zinc and copper separated by brine-soaked cardboard. The unit of electric potential, the 'Volt', is named after him.
The steam engine, which powered the Industrial Revolution, was significantly improved by?
Correct Answer: A. James Watt
James Watt added a separate condenser to the existing Newcomen engine to improve efficiency. This allowed the engine to waste less heat and perform much more work. The 'Watt' is the standard unit of power in his honor.
Which inventor is known for creating the first gasoline-powered automobile in 1885?
Correct Answer: C. Karl Benz
Karl Benz built the Motorwagen, which is considered the first true automobile. It featured three wheels and an internal combustion engine that ran on fuel. His wife Bertha Benz made the first long-distance trip to prove its reliability.
The invention of the lightning rod to protect buildings from strikes is attributed to?
Correct Answer: A. Benjamin Franklin
Benjamin Franklin conducted his famous kite experiment to prove that lightning is electricity. He then developed the pointed iron rod to safely conduct lightning into the ground. This simple device has saved countless structures from fire and damage.
Who invented the first successful rigid airship, which was used for long-distance travel?
Correct Answer: C. Ferdinand von Zeppelin
Count Ferdinand von Zeppelin developed large, hydrogen-filled airships with a metal internal structure. These vessels were the first to provide scheduled international flights across the ocean. They remained popular until the rise of fixed-wing airplanes.
The first practical refrigerator for home use, using non-toxic gases, was developed by?
Correct Answer: C. Fred Wolf
Fred Wolf invented the first electric domestic refrigerator in 1913. Before this, people used iceboxes filled with blocks of ice to keep food cold. Refrigeration revolutionized food safety by slowing down bacterial growth.
Who is credited with the invention of the ballpoint pen in 1938?
Correct Answer: A. László Bíró
László Bíró, a Hungarian journalist, noticed that newspaper ink dried quickly and stayed smudge-free. He combined this type of ink with a tiny ball-and-socket mechanism at the tip. Today, ballpoint pens are the most used writing instruments worldwide.
The invention of the microscope is generally attributed to which Dutch spectacle maker?
Correct Answer: C. Zacharias Janssen
Zacharias Janssen is often credited with creating the first compound microscope around 1590. This allowed scientists to see objects too small for the naked eye. Robert Hooke and Leeuwenhoek later used improved versions to discover cells and bacteria.
Who invented the first practical pneumatic (air-filled) tire for bicycles and cars?
Correct Answer: D. John Boyd Dunlop
John Boyd Dunlop created the first successful air-filled tire to make his son's tricycle ride smoother. This invention replaced solid rubber tires and greatly increased vehicle comfort and speed. It was a crucial development for the early automotive industry.