2. Solved Papers
  3. WB JEE Medical

WB JEE Medical WB JEE Medical Solved Paper-2006

  • question_answer
    The figure shows variation of photocurrentwith anode potential for a photo-sensitivesurface for three different radiations. Let \[{{I}_{a}},{{I}_{b}}\]and \[{{I}_{c}}\]be the intensities and Vg, v^, and v,; be thefrequencies for the curves a,b and crespectively. Then :

    A)  \[{{v}_{a}}={{v}_{b}}\]and\[{{I}_{a}}\ne {{I}_{b}}\]

    B)  \[{{v}_{a}}={{v}_{c}}\]and\[{{I}_{a}}={{I}_{c}}\]

    C)  \[{{v}_{a}}={{v}_{b}}\]and\[{{I}_{a}}={{I}_{b}}\]

    D)  \[{{v}_{b}}={{v}_{c}}\]and\[{{I}_{b}}={{I}_{c}}\]               

    Correct Answer: A

    Solution :

                     Saturation current is proportional to intensity while stopping potential increases with increase in frequency. Hence, \[{{v}_{a}}={{v}_{b}}\]while \[{{I}_{a}}<{{I}_{b}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner