General Knowledge Quiz for Friday, 30 August 2013
A new general knowledge quiz is available every day. Try today's quiz or work through our archive of daily and themed quizzes.
Question 1: In 1906, Lee de Forest developed a "triode" to amplify and convert alternating current to direct current, which played a major role in the development of which invention?
A
B
Refrigerator
Radio
C
The manufacture of horses' bridles
D
The thatching of roofs