Free Modern Physics and Electronics Quiz | University Admission Physics Practice

Modern Physics and Electronics

Question 1 of 5

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In a photoelectric experiment, monochromatic light of different frequencies \(f\) falls on a clean metal surface and the stopping potential \(V_s\) is measured each time. The graph of \(V_s\) against \(f\) is shown. \(\left[e=1.6\times10^{-19}\text{ C}\right]\)

Which pair of values for the Planck constant \(h\) and the work function \(\phi\) of the metal is supported by the graph?

Select one option.

\(h=4.1\times10^{-15}\text{ J s},\ \phi=2.07\text{ eV}\)
\(h=6.6\times10^{-34}\text{ J s},\ \phi=2.07\text{ eV}\)
\(h=6.6\times10^{-34}\text{ J s},\ \phi=4.14\text{ eV}\)
\(h=6.6\times10^{-34}\text{ J s},\ \phi=0\text{ eV}\)
\(h=6.6\times10^{-34}\text{ J s},\ \phi=3.31\text{ eV}\)

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