Physics Practice MCQ Page 14
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: 435 The longitudinal chromatic aberration for an incident parallel beam of light on a lens of unit focal length is numerically equal to
- its focal length
- its dispersive power
- reciprocal of its dispersive power
- None of these
Question: 436 A person cannot see distinctly objects situated at a distance greater than 60 cm from the eye. The power
(in diopters) of the lens he must use for the spectacles to correct the defect is
- +60 D
- 1.67 D
- -1.67 D
- -50 D
Question: 437 When we decrease the diameter of the objective lens of a telescope, then the resolution of telescope
- decreases
- increases
- remains the same
- depends on the focal length of the lens
Question: 438 A astrono0mical telescope has a magnifying power of 8 when focuses for parallel for parallel rays. If the length of the telescope be 18 cm, the focal length of the objective is
- 16 cm
- 10 cm
- 144 cm
- 2.25 cm
Question: 439 The vibrations of an unpasteurized light are taking place
- In all planes
- In one plane
- In no plane
- All are true
Question: 440 Two lenses are made of the same material, to achieve achromatisation we should place them,
- in contact
- at a finite distance apart
- in any way
- non of these
Question: 441 The quantity of the charge that passes through a conductor while a current of 5.0. A flows through it for 100S (in coulombs) is
- 1800
- 1000
- 500
- none of these
Question: 442 Lenz's law in E.M.I follows from Law of Conservation of
- charge
- energy
- momentum
- mass
Question: 443 The reciprocal of the square root of the product of the magnetic permeability of a medium and its dielectric constant is
- its reluctance
- its specific heat
- its impedance
- the velocity of light
Question: 444 A magnet makes 5 oscillations per minute in earth's magnetic field (H = 0.3 Gauss). By what amount the field should be increased so that the magnet may make 10 oscillations per minute
- 0.3 Gauss
- 0.6 Gauss
- 0.9 Gauss
- 1.2 Gauss
Question: 445 The radius of the circular path of a charge particle moving at right angles to a uniform magnetic field is directly proportional to the
- momentum of the particle
- flux density
- wave length of ht radiation
- charge on the particle
Question: 446 Choose the correct statement
- Joule's effect is reversible but Peltier's effect is irreversible
- Joule's effect is irreversible but Peltier's effect is reversible
- Both Joule's effect and Peltier's effect are reversible
- Both Joule's effect and Peltier's effect are reversible
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
435 . B
436 . A
437 . B
438 . B
439 . A
440 . B
441 . C
442 . B
443 . D
444 . C
445 . A
446 . D
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MCQ for Practicing Subject Tests