Following graphs show the variation of stopping potential corresponding to the frequency of incident radiation (F) for a given metal. The correct variation is shown in graph ( $v_{0}$ = Threshold frequency) :

(1)

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(2)

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(3)

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(4)

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Solution

The correct option is A $(1)$
The stopping potential is the potential necessary to stop any electron from reaching outside. When the frequency of radiation is beyond these threshold frequency electrons are emitted from the metal surface. Threshold frequency is the minimum frequency require to remove an electron from the metal surface. So at $V_{o}$ (threshold frequency) the electrons are removed and to stop these electrons much energy is needed ie, the stopping potential increases with increase in frequency after $V_{o}$ because more electrons are emitted from the metal surface.

So option A is correct.

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Similar questions

Q. The graph shows variation of stopping potential

V_{0}

versus frequency of incident radiation for two photosensitive metals A and B. Which of the two metals has higher threshold frequency and why?

Q. The graph shows variation of stopping potential

V_{0}

versus frequency of incident radiation

v

for two photosensitive metals A and B. Which of the two metals has higher threshold frequency and why?

Q. Draw a graph showing the variation of stopping potential

(V_{0})

with the

3

frequency of incident radiation

(v)

in relation to the electric effect.
How can the value of Plancks constant be determined from this graph?

Q. Sketch the graphs showing variation of stopping potential with frequency of incident radiations for two photosensitive materials A and B having threshold frequencies

v_{A} > v_{B}

.

(i) In which case is the stopping potential more and why ?

(ii) Does the slope of the graph depend on the nature of the material used ? Explain.

Derive the expression for the stopping potential in terms of frequency of incident radiation and hence draw the graph showing the variation of the two quantities with respect to each other.

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Following graphs show the variation of stopping potential corresponding to the frequency of incident radiation (F) for a given metal. The correct variation is shown in graph ( v0 = Threshold frequency) :

Following graphs show the variation of stopping potential corresponding to the frequency of incident radiation (F) for a given metal. The correct variation is shown in graph ( $v_{0}$ = Threshold frequency) :