About Physics

Following are some of the multiple choice questions on the Physics with answers that will help the students in developing their knowledge.

Physics MCQ

1. What is acceleration?

  • The speed and direction of an object's motion. 
  • An increase or decrease in speed, or a change in direction. 
  • The tendency of an object to resist change in its motion. 
  • none of the above

2. What is velocity?

  • the quickness of an object
  • the location of an object
  • acceleration
  • speed in a specific direction

3. What is current?

  • The flow of charge
  • The potential of motion
  • The flow of energy
  • Motion of energy

4. What is Resistance?

  • An electrical quantity that measures how a device resist to motion
  • An electrical quantity that measures how a device or material reduces electric current
  • An electrical quantity that measures how a device resist to energy
  • An electrical quantity that measures how a device reduces energy

5. What is voltage?

  • What creates electricity
  • What creates energy
  • What creates current
  • What creates volts

6. De Broglie equation

  • relates the momentum of a mass to its wavelength
  • relates the energy of a mass to its wavelength
  • relates the frequency of a mass to its wavelength
  • relates the work function of a mass to its wavelength

7. What is Newton's First Law

  • F=ma
  • Every action has an equal and opposite reaction
  • An object at rest stays at rest, an object in motion stays in motion. 
  • Friction 

8. The gravitational force between two bodies is

  • repulsive at large distances
  • attractive at all places
  • repulsive at short distances
  • attractive at short distances

9. How do solar panels work?

  • Sun hits the solar panel and releases quarks
  • Light hits the solar panel and releases photons
  • Photons hit the solar panel and release electrons
  • Electrons jump energy levels and release photons

10. How does a star form?

  • Contraction of a large amount of gas into heavier element by way of nuclear fusion
  • Contraction of a large amount of gas into heavier element by way of nuclear fission
  • Expansion of large amount of gas by nuclear fission
  • Expansion of large amount of gas by nuclear fusion

11. What is the unit of Astronomical Distance ?

  • Light year
  • Angstrom
  • Weber
  • Lux

12. What is radioactive decay?

  • The spontaneous breakdown of an atomic nucleus resulting in only energy release
  • The spontaneous breakdown of an atomic nucleus resulting in only matter release
  • The spontaneous breakdown of an atomic nucleus resulting in a release of energy and matter
  • The decay of the use of radios and the increased use of televisions.

13. Which is an example of zero acceleration?

  • A merri-go-round moving at a constant rate
  • A car coming to a stop
  • A boat speeding up
  • A person running on a treadmill at a rate of 6 MPH

14. What separates the outer ear from the middle ear?

  • Auricle
  • The ear wall
  • Eardrum
  • Cochlea

15. What is the mass of an alpha particle?

  • 1
  • 2
  • 3
  • 4

16. The function representing matter waves must be ________

  • Complex
  • Real
  • Zero
  • Infinity

17. Which law is also called the law of inertia ?

  • Newton's Second Law
  • Newton's Third Law
  • Newton's first law
  • All of the above

18. Which one is correct Schrodinger time dependent equation?

  • H = E
  • H = Eψ
  • Hψ = ψ
  • Hψ = Eψ

19. A lens that is thicker in the middle and thinner on the ends is a

  • Focal lens
  • Convex lens
  • diverging lenses
  • All of above

20. What is the definition of an isotope?

  • An atom with different electron number to proton number
  • An atom with different proton number from neutron number
  • An atom with different number of protons from the periodic table
  • An atom with a different number of neutrons from the periodic table

21. The operator ∇2 is called _______ operator

  • Hamiltonian
  • Laplacian
  • Poisson
  • Vector

22. The square of the magnitude of the wave function is called_________

  • Current density
  • Probability density
  • Zero density
  • Volume density

23. What is the definition of magnitude?

  • To continue moving.
  • The strength of an object or event.
  • Energy in motion.
  • The sum of all the forces exerted on an object

24. Newton's Second Law states.........................

  • that an object in motion, stays in motion; an object at rest stays at rest. 
  • For every action there is an equal and opposite reaction.
  • that acceleration occurs when a force acts upon an object. 
  • none of the above

25. Balanced Force

  • The net force of an object does not equal zero which results in a change in the motion of the object.
  • The net force on an object is zero and the object’s motion does not change.
  • The sum of all the forces acting on an object,
  • The sum of the the forces stored in energy.

26. What happens when two forces act in the same direction?

  • They cancel each other out.
  • The stronger one prevails.
  • Their strengths are added.
  • Their sum divided by two is the total force.

27. The normalized wave function must have ________ norm

  • Infinite
  • Zero
  • Finite
  • Complex

28. Which of the following would produce the loudest sound?

  • jet plane
  • pin falling
  • doorbell
  • whisper

29. When an object rolls over a surface.

  • Sliding Friction 
  • Rolling Friction 
  • Fluid Friction 
  • All of above

30. Ball pen works on principle of

  • Boyle's law
  • Newton's law
  • Viscosity
  • Capillarity and surface tension

31. Which of the following is unit of force ?

  • Newton
  • Dyne
  • Joule
  • Both A & B

32. What is a beta particle made of?

  • One proton
  • A helium particle
  • One electron
  • One proton and one neutron

33. A ____ is a discrete, quantized bundle of energy

  • Photoelectric effect
  • Photon
  • Quantized
  • Proton

34. A jet engine works on the principle of conservation of

  • Linear momentum
  • Angular momentum
  • Energy Mass
  • Mass Velocity

35. What does pitch depend on?

  • amplitude 
  • frequency
  • intensity 
  • volume of sound

36. Morgan walks 10 miles South. Trevor walks 10 miles North in the same amount of time. They have:

  • Different average speeds
  • Different velocities
  • Same velocity
  • Same motion

37. When you make sounds by plucking a rubber band, you make the rubber band move back and forth very quickly. This movement is called.

  • loudness
  • amplitude
  • pitch
  • vibration

38. What is the name of the process of heat transfer using electromagnetic waves?

  • conduction
  • convection
  • evaporation
  • radiation

39. Forces can be added together only if they are

  • acting on the same object
  • unaffected by gravity
  • balanced forces
  • substantial

40. The force of gravity on a person or object on the surface of a planet is called

  • mass.
  • weight.
  • terminal velocity
  • free fall.

41. How many variables should be changed in an experiment?

  • 1
  • 2
  • 3
  • doesn't matter

42. When does radioactive decay occur?

  • When the nucleus of an isotope is unstable
  • When the nucleus of an isotope is stable
  • When the electrons of an isotope are spinning
  • When the electrons of an isotope are shared with another isotope

43. What is a force that pulls objects together?

  • Friction Force
  • Gravity Force
  • Buoyant Force
  • Centripetal Force

44. What happens when an object accelerates?

  • Its speed or direction changes
  • Only its speed changes
  • Only its direction changes
  • Its speed and direction do not change

45. A disturbance that travels through a medium as a longitudinal wave

  • sound
  • wavelength
  • pitch
  • frequency

46. What are the SI units for power?

  • Watts
  • Ohms
  • Volts
  • Amperes

47. What are the SI units for resistance?

  • Watts
  • Ohms
  • Volts
  • Amperes

48. According to Newton’s third law of motion, the strength of a reaction force is ____________________ the strength of the action force.

  • equal to
  • negative to
  • positive to
  • greater than

49. When you see the word "MOVING" what should you think?

  • Unbalanced
  • Balanced
  • Potential Energy
  • No Work

50. The force of gravity is responsible for continuously changing the ____________________ in which a satellite moves.

  • direction
  • orbit
  • centripetal force
  • Both A & B

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