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Q. No.The curves (1), (2), (3) and (4) show the variation between the applied potential difference \((V)\) and the photoelectric current \((i)\), at two different intensities of light \((I_1>I_2)\). In which figure is the correct variation shown?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Photoelectric Effect: Experiment |
92%
Level 1: 80%+
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The value of stopping potential in the following diagram is given by:
| 1. | \(-4\) V | 2. | \(-3\) V |
| 3. | \(-2\) V | 4. | \(-1\) V |
Subtopic: Photoelectric Effect: Experiment |
90%
Level 1: 80%+
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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 \(a\) and \(b\) represent incident radiations of different frequencies and different intensities. |
| 2. | Curves \(a\) and \(b\) represent incident radiation of the same frequency but of different intensities. |
| 3. | Curves \(b\) and \(c\) represent incident radiation of different frequencies and different intensities. |
| 4. | Curves \(b\) and \(c\) represent incident radiations of the same frequency having the same intensity. |
Subtopic: Photoelectric Effect: Experiment |
86%
Level 1: 80%+
AIPMT - 2009
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When monochromatic radiation of intensity \(I\) falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are \(N\) and \(T\) respectively. If the intensity of radiation is \(2I\) what is the number of emitted electrons and their maximum kinetic energy?
| 1. | \(N\) and \(2T\) | 2. | \(2N\) and \(T\) |
| 3. | \(2N\) and \(2T\) | 4. | \(N\) and \(T\) |
Subtopic: Photoelectric Effect: Experiment |
82%
Level 1: 80%+
NEET - 2010
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The figure shows different graphs between stopping potential \(V_0\) and frequency (\(\nu\)) for the photosensitive surfaces of cesium, potassium, sodium and lithium. The plots are parallel.
| 1. | Cesium |
| 2. | Potassium |
| 3. | Sodium |
| 4. | Lithium |
| 1. | (i) > (ii) > (iii) > (iv) | 2. | (i) > (iii) > (ii) > (iv) |
| 3. | (iv) > (iii) > (ii) > (i) | 4. | (i) = (iii) > (ii) = (iv) |
Subtopic: Photoelectric Effect: Experiment |
76%
Level 2: 60%+
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The number of photo-electrons emitted per second from a metal surface increases when:
| 1. | The energy of incident photons increases. | 2. | The frequency of incident light increases. |
| 3. | The wavelength of the incident light increases. | 4. | The intensity of the incident light increases. |
Subtopic: Photoelectric Effect: Experiment |
82%
Level 1: 80%+
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For a photoelectric cell, the graph showing the variation of the cut of voltage \((V_0)\) with frequency \((\nu)\) of incident light is best represented by:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Photoelectric Effect: Experiment |
77%
Level 2: 60%+
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Which is the correct curve between the stopping potential \((V_0)\) and the intensity of incident light \((I)\)?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Photoelectric Effect: Experiment |
80%
Level 1: 80%+
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The graph between the intensity of light falling on a metallic plate \((I)\) and the generated current \((i)\) is given by:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Photoelectric Effect: Experiment |
79%
Level 2: 60%+
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If in a photoelectric experiment, the wavelength of incident radiation is reduced from \(6000~\mathring{A}\) to \(4000~\mathring{A}\), then:
| 1. | The stopping potential will decrease. |
| 2. | The stopping potential will increase. |
| 3. | The kinetic energy of emitted electrons will decrease. |
| 4. | The value of the work function will decrease. |
Subtopic: Photoelectric Effect: Experiment |
76%
Level 2: 60%+
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