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PhysicsMediumMCQ2023 · 12 Apr Shift 1

Q26.A proton and an α -particle are accelerated from rest by 2 V and 4 V potentials, respectively. The ratio of their de-Broglie wavelength is : (1) 8 : 1 (2) 2 : 1 (3) 4 : 1 (4) 16 : 1

What This Question Tests

This question tests the relationship between de-Broglie wavelength, momentum, and kinetic energy gained by charged particles accelerated through a potential difference.

Concepts Tested

De-Broglie wavelengthKinetic energy of accelerated charged particleMass and charge of proton and alpha particle

Formulas Used

λ = h/p

K = qV

p = sqrt(2mK)

📚 NCERT Sections This Tests

12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,

Physics Class 12 · Chapter 12

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12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.

11.10 — What Is The De Broglie Wavelength Of

Physics Class 12 · Chapter 11

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11.10 What is the de Broglie wavelength of (a) a bullet of mass 0.040 kg travelling at the speed of 1.0 km/s, (b) a ball of mass 0.060 kg moving at a speed of 1.0 m/s, and (c) a dust particle of mass 1.0 × 10–9 kg drifting with a speed of 2.2 m/s ?

12.4 — The Ground State Energy Of Hydrogen Atom Is –13.6 Ev. What Are The

Physics Class 12 · Chapter 12

80% match

12.4 The ground state energy of hydrogen atom is –13.6 eV. What are the kinetic and potential energies of the electron in this state?

📋 Question Details

Chapter: Dual Nature of Matter
Topic: De-Broglie wavelength, Accelerated charged particles
Year: 2023
Shift: 12 Apr Shift 1
Q Number: Q26
Type: MCQ
NCERT Ref: Class 12 Physics Ch 11: Dual Nature of Radiation and Matter

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