15. Who invented Radar ?
A. J.H. Van Tassel
B. Wilhelm K. Roentgen
C. P.T. Farnsworth
D. A.H. Taylor & Leo C. Young
16. Who built the first modern motorcar?
A. Henry Ford
B. Karl Benz
C. Daimler
D. Henry Austin
17. Who developed the first automatic automobile ?
A. Goatleab Daimler
B. Henry Ford
C. Rudolf Diesel
D. Karl Benz
18. Who is recognised as the Father of Geometry ?
A. Pythagoras
B. Euclid
C. Johann Kepler
D. Rene Descartes
19. Who invented optical fibre ?
A. Samuel Cohen
B. Narinder Kapany
C. Percy L. Spencer
D. T.H. Maimah
20. Who invented the video-tape ?
A. Richard James
B. Charles Ginsberg
C. P. T. Farnsworth
D. Georges de Mestral
21. Electron was discovered by
A. Ernest Rutherford
B. Max Planck
C. Joseph Thomson
D. Albert Einstein
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