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A potential difference of 20 kV is applied across an X-ray tube. The minimum wavelength of X-rays generated is

Options

  1. A0.84 Å
  2. B0.31 Å
  3. C0.62 Å
  4. D0.96 Å

Correct answer

C. 0.62 Å

Step-by-step solution

E = h ⁡ c ⁡ λ ∴ λ min = h ⁡ c ⁡ e ⁡ V ⁡ = 6 . 6 3 × 1 0 - 3 4 × 3 × 1 0 8 1 . 6 × 1 0 - 1 9 × 2 0 × 1 0 3 = 0 . 6 2 A o

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