| ⇦ | 
| ⇨ |
The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
Options
(a) 11.2×10⁻¹⁷ J
(b) 12.9×10⁻¹⁶ J
(c) 1.7×10⁻¹⁵ J
(d) 10×10⁻¹⁶ J
Correct Answer:
12.9×10⁻¹⁶ J
Explanation:
Required ionization energy, E = hc / λ
E = 6.6 × 10⁻³⁴ × 3 × 10⁸ / 1.5 × 10⁻¹°
= 12.9 × 10⁻¹⁶ J
Related Questions: - The unit of thermal conductivity is
- A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle
- Magnetic flux φ (in weber) linked with a closed circuit of resistance 10 Ω varies
- Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- Two solid discs of radii r and 2r roll from the top of an inclined plane
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The unit of thermal conductivity is
- A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle
- Magnetic flux φ (in weber) linked with a closed circuit of resistance 10 Ω varies
- Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- Two solid discs of radii r and 2r roll from the top of an inclined plane
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply