Physics Practice MCQ Page 13
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: 394 During an isothermal compression, it the pressure of a given mass of a gas of volume V increased by 10 fold, the change that will take place
- volume will become 10V, head will be absorbed
- volume will become 10V, heat will be given out
- volume will become V/10, heat will be absorbed
- volume will become V/10, heat will be given out
Question: 395 If a black body is surrounded at room temperature by another body at a higher temperature, the heat energy radiated per unit area per second is
- proportional to the difference of temperature between the two
- proportional to the fourth power temperature difference between the two
- Equal to Steafan's constant times the fourth power of temperature difference between two
- proportional the the square of the temperature difference.
Question: 396 In the distribution of energy radiated b a black body, we find Planck's formula reduces to Rayleigh Jeans formula in a black body radiation for
- Higher wavelength region
- Small wavelength
- Both a and b
- None of the above
Question: 397 We can employ the principle of adiabatic de-magnetisation for
- Demagnetising a strong magnet
- Generation of Thermo e.m.f
- Liquefaction of gases
- None of the above
Question: 398 Light waves
- require air or another gas to travel through
- require an electric field to travel through
- require a magnetic field to travel through
- can travel through a perfect vacuum
Question: 399 Light is incident from water at an angle of 60° into a transparent medium. If the angle of refraction is 30°, the index for the medium is
- 1.15
- 1.5
- 2.3
- 3.1
Question: 400 Two lenses of power-15 and 2.5 dioptres are placed in contact. The combination will behave as
- convex lens of focal length 100 cm.
- concave lens of focal length 3.75 cm.
- convex lens of focal length 37.5 cm.
- concave lens of focal length 100 cm.
Question: 432 In Huygen's eye-piece
- the focal length of field lens is equal to the focal length of eye-piece
- the focal length of field lens is three times the focal length of eye-lens
- the focal length of eye lens is three times the focal length of the field lens
- none of the abvoe
Question: 433 Telephoto lens of a movie camera differs from usual lens as it has a
- longer focal length
- longer aperture
- shorter aperture
- shorter focal length
Question: 434 The discovery of polarization of light confirmed that
- Light waves are transverse in nature
- Light waves are longitudinal in character
- Light waves are neither waves nor particles
- All are true
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
Answers to the questions of Physics on this page
Following list gives the correct choice for the answer of the Physics mcqs.
394 . C
395 . B
396 . A
397 . B
398 . D
399 . C
400 . A
432 . B
433 . C
434 . A
435 . B
436 . A
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