231: the work function of pure metals is greater than…..electron volt?
a) 4
b) 3
c) 2
d) 6
232: one Angstrom unit is equal to
a) 10-8 cm
b) 10-8 m
c) 10-10 cm
d) 109 m
233: in Cauchy constant the value of A is ….
a) 5.502 cm
b) 1.502
c) 1.502 inch
d) None of these
234: in Cauchy constant the value of B is ….
a) 5.236*10-11 cm2
b) 5.236*10-11 m2
c) 5.236*10-11 inch2
d) None of these
235: the least count of spectrometer made in China is
a) 1 sec
b) 1 mint
c) 30 sec
d) None of these
236: In planks constant experiment the actual value of backing off voltage for violet filter is
a) 0.25 V
b) 0.63 V
c) 0.77 V
d) None of these
237: the Lorentz force ( e/m ) experiment current direction switch is
a) 1 way
b) 2 way
c) 3 wayd) None of these
238: The actual value of e/m is
a) 1.7*10-11 C/kg
b) 1.7*1017 C/kg
c) 1.7*1019 C/kg
d) none of these
239: the diameter of Lee disk is
a) 1.50 cm
b) 1.43 inch
c) 1.50 inch
d) 1.43 cm
240: The violet colour has the shortest wavelength of all the seven colour spectrum, has the………… deviation
a) Least
b) Greatest
c) both a & b
d) none of these
241: The wavelength of red filter which is used in plank’s constant experiment is
a) 620 nm
b) 620 micro m
c) 530 nm
d) 530 micro m
242: One Tesla is equal to
a) N/A/m
b) N/A/mm
c) N/A/cm
d) None of these
243: The thickness of Lee disk……mm
a) 0.998 inch
b) 0.998 cm
c) 0.872 inch
d) 2.223 inch
244: The specific heat of water is equal to?
a) 4190 J/kg/K
b) 4000 w/kg/K
c) 4100 J/sec/kg/K
d) 4190 J/sec/kg/K
245: the unit of thermal conductivity K of Copper is…
a) 4000 w/m K
b) 400 w/m K
c) 0.0400 w/m K
d) 0.4000 w/ m K
246: IN searl’s apparatus the length of between ∅1 & ∅2 is
a) 3.165 inch
b) 2.165 inch
c) 3.165 cm
d) 2.165 cm
247: In plank’s constants experiment range of Pico meter selected………pA
a) 3.00
b) 0.003
c) 0.03
d) None of these
248: In planks apparatus the photo emissive cell is ideal for free with…….. light
a) Visible
b) Near ultra violet
c) Near infra-red
d) Both a & b
e) Both a & c
249: the refractive index of prism is
a) 1.43
b) 1.4
c) 1.33
d) None of these
250: the semiconductor laser used in the experiment of measuring sugar contents of a liquid has wavelength of
a) 632nm
b) 640nm
c) 630nm
d) None of these
251:9 The probability of occurrence of a microstate depends on
a) low energy microstates
b) high energy microstates
c) number of microstates
d) type of system
252: A microcanonical ensemble depends on
a) many isolated systems
b) systems equilibrium
c) energy range
d) all these
253: Minimum number of independent coordinates used to define configuration of a system
are called
a) phase space
b) hyper space
c) configurational space
d) none of these
254: Jacobian is a
a) matric
b) derivative
