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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
Related Questions: - In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
- A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
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Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
- A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
- A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest
- A particle of unit mass undergoes one-dimensional motion such that its velocity varies
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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