Free Test De Broglie waves – NEET

Q1: Who proposed the concept of matter waves?

A. Einstein B. de Broglie C. Planck D. Bohr

Q2: The de Broglie wavelength λ is given by:

A. λ = h/p B. λ = p/h C. λ = hc D. λ = mv

Q3: What is the unit of de Broglie wavelength?

A. Meter B. Joule C. Second D. Newton

Q4: de Broglie wavelength for an electron moving with momentum 3×10⁻²⁴ kg·m/s is:

A. 2.2×10⁻¹⁰ m B. 6.6×10⁻³⁴ m C. 1×10⁻⁷ m D. 3×10⁻²⁴ m

Q5: De Broglie waves are significant for:

A. Macroscopic objects B. Atoms and subatomic particles C. Planets D. Everyday objects

Q6: Which experiment confirmed the wave nature of electrons?

A. Young’s double slit B. Photoelectric effect C. Compton scattering D. Franck-Hertz

Q7: If mass of a particle increases, its de Broglie wavelength:

A. Increases B. Decreases C. Remains constant D. Becomes infinite

Q8: Which of the following has the shortest de Broglie wavelength?

A. Electron B. Proton C. Neutron D. A macroscopic ball

Q9: The de Broglie wavelength is inversely proportional to:

A. Velocity B. Momentum C. Energy D. Force

Q10: Planck’s constant h is approximately:

A. 6.626×10⁻³⁴ Js B. 3×10⁸ m/s C. 1.6×10⁻¹⁹ C D. 9.8 m/s²

Q11: If the velocity of an electron doubles, its de Broglie wavelength:

A. Doubles B. Halves C. Remains same D. Quadruples

Q12: Matter waves demonstrate that particles have:

A. Only particle nature B. Only wave nature C. Both wave and particle nature D. None of these

Q13: The wave nature of electrons is exploited in:

A. Electron microscope B. Radio antenna C. Laser D. X-ray machine

Q14: De Broglie wavelength of a macroscopic object is:

A. Very large B. About 1 meter C. Negligibly small D. Variable

Q15: What is the momentum of a particle if its de Broglie wavelength is 1 nm?

A. 6.626×10⁻²⁵ kg·m/s B. 6.626×10⁻³⁴ kg·m/s C. 1×10⁻⁹ kg·m/s D. None

Q16: Matter waves were proposed to explain:

A. Photoelectric effect B. Electron diffraction C. Blackbody radiation D. Atomic spectra

Q17: Which physical constant relates energy and frequency?

A. Speed of light B. Planck’s constant C. Electron mass D. Boltzmann constant

Q18: The de Broglie hypothesis applies to:

A. Only light B. Only electrons C. All matter D. Only photons

Q19: Which equation is NOT related to de Broglie wavelength?

A. λ = h/p B. E = hf C. λ = c/f D. K.E = hf - φ

Quiz for De Broglie waves