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PHYSICS MCQs

Total Questions : 3767 | Page 376 of 377 pages
Question 3751. A ____ is a discrete, quantized bundle of energy
  1.    Photoelectric effect
  2.    Photon
  3.    Quantized
  4.    Proton
 Discuss Question
Answer: Option B. -> Photon
Question 3752. The square of the magnitude of the wave function is called_________
  1.    Current density
  2.    Probability density
  3.    Zero density
  4.    Volume density
 Discuss Question
Answer: Option B. -> Probability density
Question 3753. Forces can be added together only if they are
  1.    acting on the same object
  2.    unaffected by gravity
  3.    balanced forces
  4.    substantial
 Discuss Question
Answer: Option A. -> acting on the same object
Question 3754. How many variables should be changed in an experiment?
  1.    1
  2.    2
  3.    3
  4.    doesn't matter
 Discuss Question
Answer: Option A. -> 1
Question 3755. The force of gravity on a person or object on the surface of a planet is called
  1.    mass.
  2.    weight.
  3.    terminal velocity
  4.    free fall.
 Discuss Question
Answer: Option B. -> weight.
Question 3756. Which of the following is unit of force ?
  1.    Newton
  2.    Dyne
  3.    Joule
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 3757. What is the definition of an isotope?
  1.    An atom with different electron number to proton number
  2.    An atom with different proton number from neutron number
  3.    An atom with different number of protons from the periodic table
  4.    An atom with a different number of neutrons from the periodic table
 Discuss Question
Answer: Option D. -> An atom with a different number of neutrons from the periodic table
Question 3758. When does radioactive decay occur?
  1.    When the nucleus of an isotope is unstable
  2.    When the nucleus of an isotope is stable
  3.    When the electrons of an isotope are spinning
  4.    When the electrons of an isotope are shared with another isotope
 Discuss Question
Answer: Option A. -> When the nucleus of an isotope is unstable
Question 3759. What is a force that pulls objects together?
  1.    Friction Force
  2.    Gravity Force
  3.    Buoyant Force
  4.    Centripetal Force
 Discuss Question
Answer: Option B. -> Gravity Force
Question 3760. What is a beta particle made of?
  1.    One proton
  2.    A helium particle
  3.    One electron
  4.    One proton and one neutron
 Discuss Question
Answer: Option C. -> One electron

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