NEET Physics
Photoelectric Effect Experiment
Low Priority
Consistency: 35%
Weightage: 7 / 20 Yrs
High-Yield Trend
1
2025 1
2023 1
2011 1
2010 3
2009 1
2007 1
2006 Questions 9 MCQs
01
PYQ 2006
easy
physics ID: neet-200
A photocell employs a photo-electric effect to convert:
| 1. | change in the frequency of light into a change in electric voltage. |
| 2. | change in the intensity of illumination into a change in photoelectric current. |
| 3. | change in the intensity of illumination into a change in the work function of the photocathode. |
| 4. | change in the frequency of light into a change in the electric current. |
1
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2
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3
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4
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02
PYQ 2007
easy
physics ID: neet-200
Monochromatic light of frequency 6.0\times 1014 Hz is produced by a laser. The power emitted is 2\times 10-3 W. The number of photons emitted, on average, by the source per second is:
1.
2.
3.
4.
1
(1)
2
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3
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4
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03
PYQ 2009
easy
physics ID: neet-200
Monochromatic light of wavelength 667 nm is produced by a helium-neon laser. The power emitted is 9mW. The number of photons arriving per second on average at a target irradiated by this beam is:
1. 9 x 1017
2. 3 X 1016
3. 9 x 1015
4. 3 X 1019
1
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2
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3
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4
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04
PYQ 2009
easy
physics ID: neet-200
The figure shows a plot of photocurrent versus anode potential for a photosensitive surface for three different radiations. Which one of the following is a correct statement?
| 1. | Curves and represent incident radiations of different frequencies and different intensities. |
| 2. | Curves and represent incident radiation of the same frequency but of different intensities. |
| 3. | Curves and represent incident radiation of different frequencies and different intensities. |
| 4. | Curves and represent incident radiations of the same frequency having the same intensity. |
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05
PYQ 2009
easy
physics ID: neet-200
The number of photoelectrons emitted for the light of a frequency (higher than the threshold frequency 0) is proportional to:
1. -0
2. threshold frequency (0)
3. intensity of light
4. frequency of light ()
1
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2
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3
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06
PYQ 2010
easy
physics ID: neet-201
A source S1 is producing 1015 photons per sec of wavelength 5000 Å. Another source S2 is producing 1.02\times 1015 photons per second of wavelength 5100 Å. Then, (power of S2)/(power of S1) is equal to:
1. 1.00
2. 1.02
3. 1.04
4. 0.98
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07
PYQ 2011
easy
physics ID: neet-201
In the photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is:
1. 1.3 V
2. 0.5 V
3. 2.3 V
4. 1.8 V
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08
PYQ 2023
easy
physics ID: neet-202
The work functions of Caesium Potassium and Sodium are and respectively. If incident electromagnetic radiation has an incident energy of which of these photosensitive surfaces may emit photoelectrons?
| 1. | only | 2. | only |
| 3. | both and | 4. | only |
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09
PYQ 2025
medium
physics ID: neet-202
Which of the following options represents the variation of photoelectric current with the property of light shown on the axis?
1. and
2. and
3. only
4. and
 |
 |
||
 |
 |
2. and
3. only
4. and
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