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Physics Mcqs

In Davisson-Germer experiment the diffracted proton from crystal shows______________?

  • (A)  Particle property
  • (B)  Wave property
  • (C)  Light property
  • (D)  Quantum property
Submitted By :Ali Uppal

The velocity of a particle of mass m of de-Broglie wavelength λ is______________?

  • (A)  v = 3 ×× 106 ms-1
  • (B)  v = 2 ×× 10 ms-1
  • (C)  v = 2 ×× 6 ms-1
  • (D)  v = 2 ×× 106 ms-1
Submitted By :Ali Uppal

A photon of wavelength 900nm behaves like a particle of mass______________?

  • (A)  5.53 x 10-36kg
  • (B)  0 kg.
  • (C)  2.46 x 10-36kg
  • (D)  1.84 x 10-44kg
Submitted By :Ali Uppal

Submitted By :Ali Uppal

If the wavelength of incident radiation is increased in photoemission then_________________?

  • (A)  The maximum kinetic energy of the photoelectrons increases
  • (B)  The minimum kinetic energy of the photoelectrons decreases
  • (C)  The minimum kinetic energy of the photoelectrons increases
  • (D)  The average kinetic energy of the photoelectrons decreases
Submitted By :Ali Uppal

Submitted By :Ali Uppal

The power of a concave lens is_______________?

  • (A)  real
  • (B)  virtual
  • (C)  positive
  • (D)  negative
Submitted By :Ali Uppal

Unit of power of a lens is________________?

  • (A)  meter
  • (B)  watt
  • (C)  diopter
  • (D)  horsepower
Submitted By :Ali Uppal

The diameter of a lens is called________________?

  • (A)  focal length
  • (B)  principal axis
  • (C)  aperture
  • (D)  radius of curvature
Submitted By :Ali Uppal

A lens which converges a beam of parallel rays to a point is called______________?

  • (A)  diverging (or concave) lens
  • (B)  converging (or convex) lens
  • (C)  plano concave lens
  • (D)  plano convex lens
Submitted By :Ali Uppal

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