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In a photoelectric effect experiment, stopping potential changes by 30 Volt if we change frequency of the radiation. The magnitude of change in the frequency is ( h = 6 × 10 − 34 J s )

Options

  1. A4 × 10 − 15   s -1
  2. B8 × 10 15 s -1
  3. C10 16 s -1
  4. D18 × 10 15   s -1

Correct answer

B. 8 × 10 15 s -1

Step-by-step solution

eV 0 = h υ - h υ 0 V 0 = h e υ - h e υ 0 Slope m = h e = Δ V 0 Δ υ Δ υ = e h × Δ V ρ = 1.6 × 1 0 - 1 9 6 × 1 0 - 3 4 × 3 0 = 8 × 1 0 1 5 s - 1

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