CS/B.TECH(New)/SEM-2/PH-201/2012
2012
PHYSICS-I
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
(Multiple Choice Type Question)
1. Choose the correct alternatives for any ten of the following:
10 x 1 = 10
i) The deBroglie wavelength of a moving electron subjected to a potential V is
a) 1.26V b) 12.26V
c) 122.6V d) 1226V
( consider the appropriate units )
ii) For Laser action to occur, the medium used must have at least
a) 2 energy levels b) 4 energy levels
c) 3 energy levels d) one energy levels
iii) The Miller indices of a plane holding the intercepts
a2 , b , 3c is
a) (361) b) (611)
c) (631) d) (321)