Given figure shows few data points in a photo-electric effect experiment for a certain metal. The minimum…

Given figure shows few data points in a photo-electric effect experiment for a certain metal. The minimum energy for ejection of electrons from its surface is: (Planck's constant h=6.62×10–34 J.s)

 

  1. 2.27 eV
  2. 2.59 eV
  3. 1.93 eV
  4. 2.10 eV

Solution

Threshold Energy =hv

=6.62×10−34×5.5×1014 J

Work friction =6.62×5.5×10−201.6×10−19eV

=2.27 eV 

Asked in: JEE Main 2020 (04 Sep Shift 1)

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