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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
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle is moving such that its position coordinates (x,y) are (2 m,3 m) at time
- In n-type semiconductor, electrons are majority charge carriers
- The transverse nature of electromagnetic waves is proved by which of the following?
- A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west.
- An open pipe resonates with a tuning fork of frequency 500 Hz. It is observed
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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