Q27.De-Broglie wavelength of an electron accelerated by a voltage of 50 V is close to (|e| = 1.6 × 10−19 C, me = 9.1 × 10−31 kg, h = 6.6 × 10−34 J s) (1) 0.5 Å (2) 1.2 Å (3) 1.7 Å (4) 2.4 Å
What This Question Tests
A straightforward application of the de-Broglie wavelength formula for an electron accelerated by a given potential difference, requiring calculation using fundamental constants.
Concepts Tested
Formulas Used
λ = h / p
p = √(2mKE)
KE = eV
📚 NCERT Sections This Tests
11.10 — What Is The De Broglie Wavelength Of
Physics Class 12 · Chapter 11
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 ?
11.3 — The Photoelectric Cut-Off Voltage In A Certain Experiment Is 1.5 V.
Physics Class 12 · Chapter 11
11.3 The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?
12.8 — A 12.5 Ev Electron Beam Is Used To Bombard Gaseous Hydrogen At
Physics Class 12 · Chapter 12
12.8 A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?
📋 Question Details
- Chapter
- Dual Nature of Matter
- Topic
- De-Broglie wavelength
- Year
- 2015
- Shift
- 10 Apr Online
- Q Number
- Q27
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Radiation and Matter
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