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The stopping potential (V₀ ) versus frequency (v) of a graph for photoelectric effect in a metal. From the graph, the planck's constant (h) is.

Options

  1. A6.60 10⁻³⁴ ~J - s
  2. B6.69 10⁻³⁴ ~J - s
  3. C6.62 10⁻³⁴ ~J - s
  4. D6.63 10⁻³⁴ ~J - s

Correct answer

A. 6.60 10⁻³⁴ ~J - s

Step-by-step solution

aligned e V₀=h (v-v₀ ) & =h v-h v₀ V₀ & = ( h e ) v- ( h e ) v₀ (i) aligned From Eq. (i), it follows that the slope of the graph is h e . Therefore, aligned h=e slope & =1.6 10⁻¹⁹ 165-0 (8-4) 10¹⁵ & = 1.6 10⁻¹⁹ 16.5 4 10¹⁵ =6.6 10⁻³⁴ ~J - s . aligned

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