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In a photoelectric effect experiment, the graph of stopping potential V versus reciprocal of wavelength obtained is shown in the figure. As the intensity of incident radiation is increased : 

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Important Questions on Dual Nature of Matter and Radiation

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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 45
When the wavelength of radiation falling on a metal is changed from 500nm to 200nm, the maximum kinetic energy of the photoelectrons becomes three times larger. The work function of the metal is close to:
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 46
The maximum velocity of the photoelectron emitted by the metal surface is v. Charge and mass of the photoelectron is denoted by e and m respectively. The stopping potential in volt is
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 47
Threshold frequency for a metal is 15×1014 Hz. The light of wavelength 6000 Å falls on the metal surface. Which one of the following statements is correct? [velocity of light, c=3×108 m s-1]
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 48

The photoelectric threshold for a certain metal surface is 360 Å. If the metal surface is irradiated by a wavelength of 1100 Å, the kinetic energy of the emitted photoelectrons is

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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 49
A beam of photons with an energy of 10.5 eV strike a metal plate. The photoelectrons are emitted with maximum velocity of 1.6×106 m s-1. The work function of the metal is
(Assume mass of electron =9×10-31 kg and Charge of electron =1.6×10-19C)
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 50
At an incident radiation frequency of v1, which is greater than the threshold frequency, the stopping potential for a certain metal is V1. At frequency 2v1 the stopping potential is 3V1. If the stopping potential at frequency 4v1 is nV1, then n is
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 51
Which is having minimum wavelength?
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 52
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5eVto 0.8eV. The work function of the metal is