QUIZ 1:Photoelectric Effect(#freetestseries) - JEE MCQ

 3×10³Hz

 6×10³Hz

 7.5×10¹²Hz

 1.5×10¹³Hz

 hλ

 chλ

 λ/hc

 hc/λ

 0

 ∞

 Between 0 and ∞

 Equal to that of an electron

 1.5×10²⁹

 1.5×10³¹

 1.5×10³³

 1.5×10³⁵

 h/λ

 Zero

 h/λc²

 h/λc

 Photographic plates are sensitive to infrared rays

 Photographic plates are sensitive to ultraviolet rays

 Infra-red rays are invisible but can cast shadows like visible light

 Infrared photons have more energy than photons of visible light

 E=hc/λ

 E=1/2(mu²)

 p=E/2v

 E=1/2(mc²)

 Photon exerts no pressure

 Photon energy is hv

 Photon rest mass is zero

 None of these

 n₁/n₂=1

 n₁/n₂=γ₁ /γ₂

n₁/n₂=γ₂/γ₁ 

n₁/n₂=γ₁²/γ₂²

 Independent of the intensity of illumination

 Independent of the frequency of light

 Inversely proportional to the intensity of illumination

 Directly proportional to the intensity of illumination

 50 watt infrared lamp

 1 watt infrared lamp

 50 watt ultraviolet lamp

 1 watt ultraviolet lamp

 (e) Both (c) and (d)

 Reproduction of pictures from the cinema film

 Reproduction of sound from the cinema film

 Automatic switching of street light

 (b) and (c) both

 They all are of the same frequency

 They have the same kinetic energy

 They have the same de Broglie wavelength

 They have their speeds varying from zero to a certain maximum

 4.81 eV

 3.74 eV

 2.66 eV

 1.07 eV

 Only if the frequency of the incident radiation is above a certain threshold value

 Only if the temperature of the surface is high

 At a rate that is independent of the nature of the metal

 With a maximum velocity proportional to the frequency of the incident radiation