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 ( ${\mathrm{I}}_{1}>{\mathrm{I}}_{2}$). In which figure is the correct variation shown?

 1 2 3 4
Subtopic:  Photoelectric Effect: Experiment |
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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 |
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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 same frequency having the same intensity.
Subtopic:  Photoelectric Effect: Experiment |
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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 |
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The figure shows different graphs between stopping potential $\left({\mathrm{V}}_{0}\right)$ 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)

Subtopic:  Photoelectric Effect: Experiment |
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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 |
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For 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
Subtopic:  Photoelectric Effect: Experiment |
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Which is the correct curve between the stopping potential (V0) and the intensity of incident light (I)?

 1 2 3 4
Subtopic:  Photoelectric Effect: Experiment |
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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 |
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If 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.

Subtopic:  Photoelectric Effect: Experiment |
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