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NEET 2011 (AIPMT, Prelims) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from NEET 2011 (AIPMT, Prelims)

Q155NEET 2011 · AIPMT · PRELIMSEasy

Photoelectric Effect: Einstein's Equation

In photoelectric emission process from a metal of work function 1.8 eV, the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is

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Answer: (c)

$eV_0 = K_{max}$ ; the work function is not needed.
$K_{max} = 0.5\text{ eV} \Rightarrow V_0 = 0.5\text{ V}$
So the answer is (c) 0.5 V.

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