JIPMER2004PhysicsElectromagnetic Waves
20 kV potential is applied across X-ray tube, the minimum wavelength of X-ray emitted will be
Options
- A0.62 Å
- B0.37 Å
- C1.62 Å
- D1.31 Å
Correct answer
A. 0.62 Å
Step-by-step solution
From relation, h c _ =e V or _ = h c e V or aligned _ & = 6.6 10⁻³⁴ 3 10^8 1.6 10⁻¹⁹ 20 10^3 & =0.62 10⁻¹⁰ ~m =0.62 Å aligned