Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1800s 1900s 1890s 1880s 1800s 1900s 1890s 1880s ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the first solid state integrated circuit demonstrated? 1950s 1960s 1970s 1980s 1950s 1960s 1970s 1980s ANSWER DOWNLOAD EXAMIANS APP
Inventions What now-ubiquitous device was invented by Zenith engineer Eugene Polley in 1955? VCR Calculator Microwave oven Remote control VCR Calculator Microwave oven Remote control ANSWER DOWNLOAD EXAMIANS APP
Inventions For what does the world owe Almon Strowger a debt of gratitude? Automatic Telephone Exchanges Parking Meters Vending Machines Traffic Lights Automatic Telephone Exchanges Parking Meters Vending Machines Traffic Lights ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Gramophone? Fahrenheit Sir Alexander Graham Bell Michael Faraday Thomas Alva Edison Fahrenheit Sir Alexander Graham Bell Michael Faraday Thomas Alva Edison ANSWER DOWNLOAD EXAMIANS APP
Inventions For over 500 years, paper was only available and sold as single sheets. In 1902, an inventive Australian used half size sheets of paper, a bit of glue and cardboard to create the what? Calendar Telephone Book Notepad Notice Board Calendar Telephone Book Notepad Notice Board ANSWER DOWNLOAD EXAMIANS APP
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