91. Who invented Electric Generator?
(a) Sir Alexander Graham Bell
(b) Michael Faraday
(c) Alfred B. Nobel
(d) Thomas Alva Edison
92. What type of system did Paul Nipkow, John Baird, and Charles Jenkins all invent?
(a) Telephone
(b) Early Warning
(c) Electricity
(d) Television
93. Who invented fuel cells in 1839?
(a) Buckminster Fuller
(b) Sir William Grove
(c) Sylvester Graham
(d) Joyce Hall
94. Which insurance salesman invented the fountain pen in 1884?
(a) Lewis Edson Waterman
(b) Sir William Grove
(c) Charles Kettering
(d) George Fountain
95. In which year was MIDI introduced?
(a) 1987
(b) 1983
(c) 1973
(d) 1977
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