On which day 'National Science Day' is celebrated in India ?
A). February 23
B). February 25
C). February 26
D). February 28
Which physicists is the writer of the book 'A Brief History of Time'?
A). Isaac Newton
B). Hans Bethe
C). Albert Einstein
D). Stephen Hawking
How many laws of physics are there?
A). 5
B). 4
C). 3
D). 2
The flux commonly used in brazing is
A). Ammonium chloride
B). Borax
C). Zinc chloride
D). Resin plus alcohol
The modulus of rigidity is the ratio of
A). Longitudinal stress to longitudinal strain
B). Volume stress to volume strain
C). Shearing stress to shearing strain
D). Tensile stress to tensile strain