physics MCQs – Page 23

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
441. In scientific notation, numbers are expressed in________________?
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A. Decimal

B. Reciprocal

C. Powers of two

D. Power of ten
442. Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________?
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A. Division of their absolute uncertainties

B. Sum of their absolute uncertainties

C. The difference of their absolute uncertainties

D. The product of their absolute uncertainties

443. Davison Germer experiment indicates__________________?
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A. Polarization

B. Refraction

C. Electron diffraction

D. Interference

444. Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
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A. focus

B. f/2

C. 2 f

D. zero

445. Blood vessels are______________?
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A. Not rigid

B. Rigid

C. Of rubber

D. Of glass

446. The energy of SHM is maximum at_______________?
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A. Mean position

B. In between mean and extreme

C. All positions during SHM

D. Extreme position

447. Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ?
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A. Only (i)

B. Only (ii)

C. Only (iii)

D. Both (i) and (ii)

448. Michelson calculated the speed of light using the instruments______________?
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A. galvanometer

B. interferometer

C. spectrometer

D. none of these

449. Einsteins photoelectric equation is given by_______________?
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A. 1/2 mvmax2-hf = ?

B. All of above are correct

C. 1/2 mvmax2=hf+?

D. 1/2 mvmax2=hf-?
450. How many types of units are in SI ?
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A. 4

B. 1

C. 3

D. 2

451. When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________?
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A. 2?

B. ?

C. 20?

D. ?/2
452. An ideal standard of measurement of a base quantity has characteristics_______________?
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A. Invariable

B. Accessible

C. Only a and b are correct

D. Transportable

453. Linear momentum of a photon is_______________?
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A. c2/hv

B. zero

C. hv/c

D. hv/c2

454. Alpha particles possess greater penetration power than that of beta particles due to its_____________?
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A. Neither greater nor smaller ionization power

B. Smaller ionization power

C. Greater ionization power

D. Same ionization power

455. If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
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A. chromatic aberration

B. spherical aberration

C. both spherical and chromatic

D. distortion

456. Which one of following postulate is in accordance with the Rutherfords model ?
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A. continuous spectra for atoms

B. discrete spectra for atoms

C. either continuous nor discrete

D. no spectrum

457. Zero error of the instrument is a type of_________________?
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A. Random error

B. Personal error

C. Classified error

D. Systematic error
458. The phase of SHM describes________________?
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A. Displacement only

B. The direction of motion only

C. Both displacement and direction of motion

D. Neither displacement nor direction of motion

459. The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body ___________________?
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A. 15 cm

B. 10 cm

C. 7.5 cm

D. 5 cm
460. Steradian is the SI unit of________________?
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A. Plane angle

B. Solid angle

C. Both plane angle and solid angle

D. Neither plane angle nor solid angle