Physics Practice MCQ Page 43

Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 3966   For image magnifications, one needs at least
  1. two convex lenses
  2. one concave and one convex lens
  3. one concave lens
  4. one convex lens
Question: 3967   A vertical tube of length 1 m and diameter 4 cm is initially filled with water. A tuning fork of frequency 700 Hz is made to sound continuously over the top of the tube while the water is allowed to flow out gradually from the bottom. The highest harmonic that can be excited by this tuning fork is
  1. ninth
  2. seventh
  3. fifth
  4. third
Question: 3968   Two thin lenses have a combined power of + 1- dioptres. when separated by 20 cm, their equivalent power is + 6.25 dioptres. Their individual powers, in dioptres, are
  1. 3.5 and 6.5
  2. 5.0 and 5.0
  3. 7.5 and 2.5
  4. 9.0 and 1.0
Question: 3969   A small object lies on the axis of a cylindrically symmetric optical system. The image will suffer symmetric optical system. The image will suffer from
  1. spherical aberration, coma and astigmatism
  2. spherical aberration and coma
  3. spherical aberration and astigmatism
  4. spherical aberration
Question: 3970   When a light wave gets refracted into a denser medium, the speed of propagation
  1. increases but the wavelength decreases
  2. decreases but the wavelength increases
  3. as well as the wavelength increase
  4. as well as the wavelength decrease
Question: 3971   A double slit is illuminated by two wavelengths 450 nm and 600 nm. What is the lowest order at which the maxima of one wavelength coincides with the minima of the other wavelength.
  1. 1
  2. 2
  3. 3
  4. 4
Question: 3973   In Young's experiment, the phase difference between two waves of a point where destructive interference takes place is
  1. 0
  2. π/4
  3. π/2
  4. π
Question: 3975   A laser beam of pulse power 1012 Watt is focused on an object of area 10-14 cm2. The energy flux in Watt/cm2 at the point of focus is
  1. 1020
  2. 1016
  3. 108
  4. 104
Question: 3976   In Ralyeigh scattering of light with frequency v, the co-efficient of scattering is proportional to
  1. v
  2. v2
  3. v3
  4. v4
Question: 3977   the population inversion in Helium-Neon laser is produced by
  1. photon excitation
  2. electron excitation
  3. inelastic atomic collisions
  4. chemical reaction
Question: 3979   consider the following statements Assertion (A): CO2 lasers are much more efficient than other lasers Reason (R): the vibrational rotational levels of the lowest electronic state are involved in the CO2 laser transitions of these statements
  1. both A and R are true and R is the correct explanation of A
  2. both A and R are true but is not a correct explanation of A
  3. A is true but R is false
  4. A is false but R is true
Question: 3982   When the temperature of a gas is increased at constant pressure, the potential energy of the molecules
  1. increases but their kinetic energy decreases
  2. decreases but their kinetic energy increases
  3. as well as their kinetic energy decrease
  4. as well as their kinetic energy increase

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
3966 . A       3967 . B       3968 . C       3969 . D       3970 . B       3971 . C       3973 . D       3975 . B       3976 . D       3977 . B       3979 . A       3982 . B      

Select Page Number

Physics Page 1Physics Page 2Physics Page 3Physics Page 4Physics Page 5Physics Page 6Physics Page 7Physics Page 8Physics Page 9Physics Page 10Physics Page 11Physics Page 12Physics Page 13Physics Page 14Physics Page 15Physics Page 16Physics Page 17Physics Page 18Physics Page 19Physics Page 20Physics Page 21Physics Page 22Physics Page 23Physics Page 24Physics Page 25Physics Page 26Physics Page 27Physics Page 28Physics Page 29Physics Page 30Physics Page 31Physics Page 32Physics Page 33Physics Page 34Physics Page 35Physics Page 36Physics Page 37Physics Page 38Physics Page 39Physics Page 40Physics Page 41Physics Page 42Physics Page 43Physics Page 44Physics Page 45Physics Page 46Physics Page 47Physics Page 48Physics Page 49Physics Page 50Physics Page 51

MCQ for Practicing Subject Tests

Biology Chemistry Computer Sciences Management Physics Other Subjects
USA College Scholarships Computer Sciences MCQ Management Sciences MCQ Physics MCQ Chemistry MCQ Biology MCQ

----------------------