Which of the following was first patented by an Australian in 1889?
A. Electric Drill
B. Electric Shaver
C. Electric Fence
D. Electric Heater
Answer: Option A
A. Electric Drill
B. Electric Shaver
C. Electric Fence
D. Electric Heater
Answer: Option A
Who invented the ballpoint pen?
A. Biro Brothers
B. Waterman Brothers
C. Bicc Brothers
D. Write Brothers
In which decade was the first solid state integrated circuit demonstrated?
A. 1950s
B. 1960s
C. 1970s
D. 1980s
A. Pneumatic rubber tire
B. Automobile wheel rim
C. Rubber boot
D. Model airplanes
Which scientist discovered the radioactive element radium?
A. Isaac Newton
B. Albert Einstein
C. Benjamin Franklin
D. Marie Curie
Join The Discussion