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 |
92%
From NCERT
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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%
From NCERT
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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 |
85%
From NCERT
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 |
81%
From NCERT
NEET - 2010
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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 |
81%
From NCERT
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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 |
78%
From NCERT
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The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs demonstrate that A's work function is:

 1 Greater than that of B. 2 Smaller than that of B. 3 Equal to that of B. 4 No inference can be drawn about their work functions from the given graphs.
Subtopic:  Photoelectric Effect: Experiment |
76%
From NCERT
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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 |
78%
From NCERT
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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 |
75%
From NCERT
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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 |
74%
From NCERT
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