Physics Test Worksheets With Answer, 2013 Page 6
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11(a) 40 eV
(b)4OkeV
(c)4OMeV
(d)Zero
Ans.(a)
42. The velocity of sound in air is 333 rn/s and the fundamental frequency of open pipe is
333 Hz. The length of pipe to produced second overtones wilt be
(a) 0.5 m
(b) 1.0 m
(c)1.5m
(d)2m
Ans.(a)
43. If the length of sonometer wire is to be half, the value of resonance frequency will be
(a) three times
(b) half
(c) four times
(d) twice
Ans.(d)
45. The intensity of the X-rays in coolidge tube control
(a) by the current flowing in the filament
(b) by potential between the cathode and anti- cathode
(c) Both (a) and (b)
(d)None of the above
Ans.(a)
46. Which of the following is correct in terms of increasing work done for the same initial
and final states?
(a) Adiabatic < Isothermal < lsobaric
(b) Isobaric < Adiabatic < Isothermal
(c) Adiabatic < Isobaric < Isothermal
(d)None of the above
Ans.(a)
54. The produced rays in sonography are
(a) microwaves
(b) infrared waves
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