A source of light is placed at a distance of 50 cm from a photocell and the stopping potential is found to be V_{0}. If the distance between the light source and photocell is made 25 cm, the new stopping potential will be

  • Option 1)

    2V_{0}

  • Option 2)

    \frac{V_{0}}{2}

  • Option 3)

    V_{0}

  • Option 4)

    4V_{0}

 

Answers (1)

As we discussed in concept

Stopping Potential /Cut-off Potential -

It is defined as the potential necessary to stop any electron from reaching the other side.

-

 

 Stopping potential depends on frequency of light and not on intensity since frequency of light remains constant, stopping potential will remain same.

 


Option 1)

2V_{0}

This option is incorrect.

Option 2)

\frac{V_{0}}{2}

This option is incorrect.

Option 3)

V_{0}

This option is correct.

Option 4)

4V_{0}

This option is incorrect.

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