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JEE Main 20249 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
9 April
Shift
Evening Shift
Subject
Physics
Chapter
Dual Nature of Matter

JEE Main 2024 · 9 April · Evening Shift · Physics · Dual Nature of Matter

UV light of 4.13 eV is incident on a photosensitive metal surface...

UV light of 4.13eV4.13 \mathrm{eV} is incident on a photosensitive metal surface having work function 3.13eV3.13 \mathrm{eV}. The maximum kinetic energy of ejected photoelectrons will be:

Options

  1. A4.13eV4.13 \mathrm{eV}
  2. B3.13eV3.13 \mathrm{eV}
  3. C1eV1 \mathrm{eV}
  4. D7.26eV7.26 \mathrm{eV}

Correct answer

C. 1eV1 \mathrm{eV}

Step-by-step solution

Ephoton =( work function )+K⋅Emax⁡∴4.13=3.13+K⋅Emax⁡∴Kmax=1eV\begin{aligned} & \mathrm{E}_{\text{photon }}=(\text{ work function })+\mathrm{K} \cdot \mathrm{E}_{\max } \\ & \therefore 4.13=3.13+\mathrm{K} \cdot \mathrm{E}_{\max } \\ & \therefore \mathrm{K}_{\mathrm{max}}=1 \mathrm{eV}\end{aligned}
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