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 ( ). In which figure is the correct variation shown?
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe value of stopping potential in the following diagram is given by:
1. – 4 V
2. – 3 V
3. – 2 V
4. – 1 V
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | 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 same frequency having the same intensity. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure shows different graphs between stopping potential and frequency (\(\nu\)) for the photosensitive surfaces of cesium, potassium, sodium and lithium. The plots are parallel.
The correct ranking of the targets according to their work function first will be:
1. (i) > (ii) > (iii) > (iv)
2. (i) > (iii) > (ii) > (iv)
3. (iv) > (iii) > (ii) > (i)
4. (i) = (iii) > (ii) = (iv)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor a photoelectric cell, the graph showing the variation of the cut of voltage (Vo ) with frequency (v) of incident light is best represented by:
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich is the correct curve between the stopping potential (V0) and the intensity of incident light (I)?
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe graph between the intensity of light falling on a metallic plate (I) and the generated current (i) is given by:
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å, 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology