Exercise 2 - Passive to Active

a. Alessandro Volta invented the electric circuit in 1786

b. Alexader Bell developed the first primitive microphone in 1875

c. Alexander Bell designed the first telephone in 1876

d. Thomas Edison produced the record player in 1877

e. Guglielmo Marconi transmitted the first radio ssignals across the Atlantic in 1901

f. Vladimir Zworykin patented the iconoscope, which produces television images, in 1928

g. Robert Watson Watt invented the Radar in 1935

h. Sergei Korolyev launched the first satellite, Sputnik 1, in 1957

i. Sony Corporation produced the Camcorder in 1982