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Aayushi Basak
Asked: 2022-11-03T03:31:48+05:30 In:

Light coming from a discharge tube filled with hydrogen falls on the cathode fo t he photoelectric cell. The work function of the surface of cathode is `4eV`. Which one of the following values of the anode voltage (in volts) with respect to the cathode will likely to make the photo current zero?
A. `-4`
B. `-6`
C. `-8`
D. `-10`

Light coming from a discharge tube filled with hydrogen falls on the cathode fo t he photoelectric cell. The work function of the surface of cathode is `4eV`. Which one of the following values of the anode voltage (in volts) with respect to the cathode will likely to make the photo current zero?
A. `-4`
B. `-6`
C. `-8`
D. `-10`
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1 Answer

  1. Correct Answer – D
    Maximum photon energy `= 13.6 eV (“emitted”)`
    So `K_(max) = 13.6 – 4 = 9.6 eV`
    Hence stopping potential is `- 9.6 V`
    So `- 10 V` can stop

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