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Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsDual Nature of Radiation and Matter2 Marks
Question
How does the maximum kinetic energy of electrons emitted vary with the work function of the metal?Maximum kinetic energy Ek = hν – W Clearly, smaller the work function W, greater is the Ek This means that when work function of a metal increases, maximum kinetic energy of photoelectrons decreases.
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Answer

Maximum kinetic energy $E_k= hν - W$
Clearly, smaller the work function W, greater is the $E_k$ This means that when work function of a metal increases, maximum kinetic energy of photoelectrons decreases.

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