Order of e/m ratio of proton, α-particle and electron is

⇦

⇨

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

Related Questions:

1. A student measures the terminal potential difference (V) of a cell
2. A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively
3. A monoatomic gas at a pressure P, having a volume V expands isothermally
4. Three masses are placed on the x-axis : 300 g at origin, 500 g at x = 40 cm
5. A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature

Topics: Dual Nature of Matter and Radiation (150)
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