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AP EAMCET20226 Jul 2022Morning ShiftChemistryStructure of AtomActual

The value of work function of a metal X is 3.1 eV . The threshold frequency of it (in Hz ) ( h =6.62 10⁻³⁴ Js )

Options

  1. A6.49 10¹³
  2. B5.49 10¹³
  3. C6.49 10¹⁴
  4. D7.49 10¹⁴

Correct answer

D. 7.49 10¹⁴

Step-by-step solution

Work function ( )=3.1 eV =3.1 1.6 10⁻¹⁹ ~J Threshold frequency (v₀ )= E h = 3.1 1.6 10⁻¹⁹ 6.626 10⁻³⁴ ~s ⁻¹ =0.748 10¹⁵ ~s ⁻¹=7.48 10¹⁴ ~Hz

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