MHT CET · Physics · Dual Nature of Matter
De-Broglie wavelength associated with an electron accelerated through a potential difference ' \(\mathrm{V}\) ' is ' \(\lambda\) '. When the accelerating potential is increased to ' \(4 \mathrm{~V}\) ', de-Broglie wavelength.
- A reduces to half
- B remains the same
- C reduces to \((1 / 4)^{\text {th }}\)
- D increases by \(25 \%\)
Answer & Solution
Correct Answer
(A) reduces to half
Step-by-step Solution
Detailed explanation
De-Broglie wavelength, \(\lambda=\frac{1.228}{\sqrt{V}}(\mathrm{~nm})\)
If \(\mathrm{V}\) is increased to \(4 \mathrm{~V}\), then \(\lambda\) will become \(\frac{1}{\sqrt{4}}\) times or \(\frac{1}{2}\) times.
If \(\mathrm{V}\) is increased to \(4 \mathrm{~V}\), then \(\lambda\) will become \(\frac{1}{\sqrt{4}}\) times or \(\frac{1}{2}\) times.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- On an imaginary linear scale of temperature (called ' \(\mathrm{W}\) ' scale) the freezing and boiling points of water are \(39^{\circ} \mathrm{W}\) and \(239^{\circ} \mathrm{W}\) respectively. The temperature on the new scale corresponding to \(39^{\circ} \mathrm{C}\) temperature on Celsius scale will beMHT CET 2021 Hard
- The angle made by orbital angular momentum of electron with the direction of the orbital magnetic moment isMHT CET 2019 Easy
- A light wave of wavelength ' \(\lambda\) 'is incident on a slit of width ' \(d\) '. The resulting diffraction pattern is observed on screen at a distance of ' \(\mathrm{D}\) '. If linear width of the principal maximum is equal to width of the slit, then the distance \(D\) isMHT CET 2022 Medium
- A pipe closed at one end has length \(0.8 \mathrm{~m}\). At its open end \(0.5 \mathrm{~m}\) long uniform string is vibrating in its \(2^{\text {nd }}\) harmonic and it resonates with the fundamental frequency of the pipe. If the tension in the wire is \(50 \mathrm{~N}\) and the speed of sound is \(320 \mathrm{~m} / \mathrm{s}\), the mass of the string isMHT CET 2021 Easy
- When an open pipe is closed from one end then the third overtone of the closed pipe is higher in frequency by than the second overtone of an open pipe. The fundamental frequency of the open-end pipe will beMHT CET 2016 Medium
- Two identical current carrying coils with same centre are placed with their planes perpendicular to each other. If current \(I=\sqrt{2} \mathrm{~A}\) and radius of the coil is \(\mathrm{R}=1 \mathrm{~m}\), then magnetic field at centre is equal to ( \(\mu_0=\) permeability of free space)MHT CET 2024 Medium
More PYQs from MHT CET
- Number of ATP molecules formed in glycolysis by substrate level phosphorylation is ____.MHT CET 2023 Medium
- Which among the following is NOT a feature of \(\mathrm{S}_{\mathrm{N}} 2\) mechanism?MHT CET 2024 Medium
- What is IUPAC name of the following compound?
MHT CET 2025 Medium - The sequence of nucleotides AUGCUUCUC indicates that it is a segment ofMHT CET 2014 Easy
- The number of and bonds in 2- formylbenzoic acid are respectivelyMHT CET 2019 Medium
- Human immune deficiency virus (HIV) is a retrovirus with centrally located two ssRNA molecules. It is covered by outer layer of I protein and inner layer made up II protein.MHT CET 2023 Medium