If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å then

(1) Stopping potential will decrease
(2) Stopping potential will increase
(3) Kinetic energy of emitted electrons will decrease
(4) The value of work function will decrease

Subtopic:  Photoelectric Effect: Experiment |
 77%
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Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment

(1) Work function of the surface

(2) Amount of photoelectric current

(3) Stopping potential will be reduced

(4) Maximum kinetic energy of photoelectrons

Subtopic:  Photoelectric Effect: Experiment |
 84%
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Which of the following statements is correct

(1) The current in a photocell increases with increasing frequency of light

(2) The photocurrent is proportional to applied voltage

(3) The photocurrent increases with increasing intensity of light

(4) The stopping potential increases with increasing intensity of incident light

Subtopic:  Photoelectric Effect: Experiment |
 89%
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4 eV is the energy of the incident photon and the work function in 2eV. What is the stopping potential ?

(1) 2V                   

(2) 4V

(3) 6V                   

(4) 22 V 

Subtopic:  Photoelectric Effect: Experiment |
 87%
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The magnitude of saturation photoelectric current depends upon 

(1) Frequency             

(2) Intensity

(3) Work function       

(4) Stopping potential

Subtopic:  Photoelectric Effect: Experiment |
 84%
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A particle of mass M at rest decays into two particles of masses m1 and m2, having non-zero velocities. The ratio of the de-Broglie wavelengths of the particles, λ1λ2is

(a) m1/m2              (b) m2/m1
(c) 1.0                   (d) m2/m1

Subtopic:  De-broglie Wavelength |
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A photon and an electron have equal energy E, then λphoton/λelectron is proportional to

(1) E                     

(2) 1/E
(3) 1/E                       

(4) Does not depend upon E

Subtopic:  De-broglie Wavelength |
 60%
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A photon of 1.7×10-13 Joules is absorbed by a material under special circumstances. The correct statement is:

1. Electrons of the atom of absorbed material will go the higher energy states

2. Electron and positron pair will be created

3. Only positron will be produced

4. Photoelectric effect will occur and electron will be produced

Subtopic:  Electron Emission |
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In a photoemissive cell with executing wavelength λ, the fastest electron has speed v. If the exciting wavelength is changed to 3λ/4, the speed of the fastest emitted electron will be 
(a) v3/41/2                              (b) v4/31/2
(c) Less than v4/31/2               (d) Greater than v4/31/2

Subtopic:  Photoelectric Effect: Experiment |
 55%
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The ratio of de-Broglie wavelengths of molecules of hydrogen and helium which are at temperature 27 °C and 127 °C respectively is
(1) 12               

(2) 38
(3) 83             

(4) 1

Subtopic:  De-broglie Wavelength |
 78%
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