Q. No.For a metal of work function \(6.6\) eV, which of the following wavelengths of incident radiation does not give rise to the photoelectric effect?
(take Planck's constant as \(6.6\times 10^{-34}\) J-s)
1. \(200~\text{nm}\)
2. \(150~\text{nm}\)
3. \(100~\text{nm}\)
4. \(50~\text{nm}\)
(take Planck's constant as \(6.6\times 10^{-34}\) J-s)
1. \(200~\text{nm}\)
2. \(150~\text{nm}\)
3. \(100~\text{nm}\)
4. \(50~\text{nm}\)
Subtopic: Photoelectric Effect: Experiment |
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Level 2: 60%+
NEET - 2026
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A beam of light falls on a metal surface such that photo-electrons are generated. If the power of the light source starts to decrease linearly with time \(t,\) then the variation of the photocurrent \(I\) and magnitude of the stopping potential \(|V|\) with time is best represented by:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Photoelectric Effect: Experiment |
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Level 2: 60%+
NEET - 2026
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A ray of light with wavelength \(\lambda\) is incident on three different photo-electric cells namely \(1,\) \(2\) and \(3.\) The threshold wavelength of these photo-electric cells are \(\lambda_1\), \(\lambda_2\), and \(\lambda_3\), respectively and the magnitude of stopping potentials of these cells are \(V_1, ~V_2 \), and \(V_3,\) respectively. The relation between \(\lambda\) and threshold wavelengths are \(\lambda_1 < \lambda_, \) \(\lambda_2>\lambda\) and \(\lambda_3>>\lambda.\) The correct option is:
1. \(V_1<V_2,~V_3=0\)
2. \(V_1=0,~V_2<V_3\)
3. \(V_1=0,~V_2>V_3\)
4. \(V_1>V_2,~V_3=0\)
1. \(V_1<V_2,~V_3=0\)
2. \(V_1=0,~V_2<V_3\)
3. \(V_1=0,~V_2>V_3\)
4. \(V_1>V_2,~V_3=0\)
Subtopic: Photoelectric Effect: Experiment |
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Level 3: 35%-60%
NEET - 2026
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Which of the following options represents the variation of photoelectric current with the property of light shown on the \(x \text{-}\)axis?
| (A) |  |
(B) |  |
| (C) |  |
(D) |  |
| 1. | (A) and (D) | 2. | (B) and (D) |
| 3. | (A) only | 4. | (A) and (C) |
Subtopic: Photoelectric Effect: Experiment |
51%
Level 3: 35%-60%
NEET - 2025
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The work functions of Caesium \((\mathrm{Cs}),\) Potassium \((\mathrm{K}),\) and Sodium \((\mathrm{Na})\) are \(2.14~\text{eV},\) \(2.30~\text{eV}\) and \(2.75~\text{eV}\) respectively. If incident electromagnetic radiation has an incident energy of \(2.20~\text{eV},\) which of these photosensitive surfaces may emit photoelectrons?
| 1. | \(\mathrm{Na}\) only | 2. | \(\mathrm{Cs}\) only |
| 3. | both \(\mathrm{Na}\) and \(\mathrm{K}\) | 4. | \(\mathrm{K}\) only |
Subtopic: Photoelectric Effect: Experiment |
69%
Level 2: 60%+
NEET - 2023
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The maximum kinetic energy of the emitted photoelectrons in the photoelectric effect is independent of the:
| 1. | work function of material |
| 2. | intensity of incident radiation |
| 3. | frequency of incident radiation |
| 4. | wavelength of incident radiation |
Subtopic: Photoelectric Effect: Experiment |
80%
Level 1: 80%+
NEET - 2023
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In a photoelectric experiment, blue light is capable of ejecting a photoelectron from a specific metal while green light is not able to eject a photoelectron. Ejection of photoelectrons is also possible using light of the colour:
| 1. | yellow | 2. | red |
| 3. | violet | 4. | orange |
Subtopic: Photoelectric Effect: Experiment |
84%
Level 1: 80%+
NEET - 2022
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Light of a frequency of \(1.5\) times the threshold frequency is incident on a photosensitive material. What happens to the photoelectric current when the frequency is cut in half and the intensity is doubled?
| 1. | four times | 2. | one-fourth |
| 3. | zero | 4. | doubled |
Subtopic: Photoelectric Effect: Experiment |
55%
Level 3: 35%-60%
NEET - 2020
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The work function of the photosensitive material is \(4.0~\text{eV}\). The longest wavelength of light that can cause photoelectric emission from the substance is (approximately):
1. \(3100~\text{nm}\)
2. \(966~\text{nm}\)
3. \(31~\text{nm}\)
4. \(310~\text{nm}\)
Subtopic: Photoelectric Effect: Experiment |
75%
Level 2: 60%+
NEET - 2019
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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
Subtopic: Photoelectric Effect: Experiment |
75%
Level 2: 60%+
AIPMT - 2011
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