Q70.If the kinetic energy of a free electron doubles. Its deBroglie wavelength changes by the factor (1) 1 (2) 2 2 (3) 1 (4) √2 √2
What This Question Tests
This question involves relating de Broglie wavelength to the kinetic energy of an electron, requiring algebraic manipulation of the relevant formulas.
Concepts Tested
Formulas Used
λ = h/p
K = p^2/(2m)
📚 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?
12.4 — The Ground State Energy Of Hydrogen Atom Is –13.6 Ev. What Are The
Physics Class 12 · Chapter 12
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
- Year
- 2005
- Shift
- Unknown
- Q Number
- Q70
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Radiation and Matter
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