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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Atomic Physics

NTA Abhyas 2020 · Physics · Atomic Physics

An X -ray tube produces a continuous spectrum of radiation with a...

An XX-ray tube produces a continuous spectrum of radiation with a cutoff wavelength of 45×10−3nm45 \times {10}^{- 3}nm. The maximum energy of a photon in the radiation (in eVeV) is
[h = 6.62 \times {10}^{- 34}Js,,c = 3 \times {10}^{8}ms^{- 1}]</p>]</p>

Options

  1. A2750027500
  2. B2250022500
  3. C1750017500
  4. D1250012500

Correct answer

A. 2750027500

Step-by-step solution

E=hcλE = \dfrac{hc}{\lambda}

=6.62×10−34×3×10845×10−12J= \dfrac{6.62 \times {10}^{- 34} \times 3 \times {10}^{8}}{45 \times {10}^{- 12}}J

=0.44×10−141.6×10−19eV=0.275×105eV=27500eV= \dfrac{0.44 \times {10}^{- 14}}{1.6 \times {10}^{- 19}}eV = 0.275 \times {10}^{5}eV = 27500eV
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