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Order of e/m ratio of proton, α-particle and electron is
Options
(a) e>p>α
(b) p>α>e
(c) e>α>p
(d) None of these
Correct Answer:
e>p>α
Explanation:
For electron (e / mₑ) = 1.6 × 10⁻¹⁹ / 9 × 10⁻³¹ = 1.75 × 10¹¹ C kg⁻¹
For proton [e / m(p)] = 1.6 × 10⁻¹⁹ / 1.67 × 10⁻²⁷ = 9.58 × 10⁷ C kg⁻¹
For α-particle [e / m(α)] = 2 × 1.6 × 10⁻¹⁹ / 6.6 × 10⁻²⁷ = 4.84 × 10⁷ C kg⁻¹
Hence the ratio (e/m) for e > p > α
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Four cells, each of emf E and internal resistance r, are connected in series across
- A juggler maintains four balls in motion,making each of them to rise
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- In photoelectric emission process from a metal of work function
- A capacitor is used to store 24 watt hour of energy at 1200 volt.
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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