MHT CET · Physics · Dual Nature of Matter
The work functions for metals A, B and C are \(1.92 \mathrm{eV}, 2.0 \mathrm{eV}\) and \(5 \mathrm{eV}\) respectively the metal (s) which will emit photoelectrons for incident radiation of wavelength \(4100 \mathrm{~A}\) is /are \([\mathrm{h}=6.63 \times 10^{-19} \mathrm{~J}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}, \mathrm{c}=3\) \(\times 10^8 \mathrm{~m} / \mathrm{s}]\)
- A Only C
- B B and C
- C Only A
- D \(A\) and \(B\)
Answer & Solution
Correct Answer
(D) \(A\) and \(B\)
Step-by-step Solution
Detailed explanation
Energy of electron with an associated wavelength of \(4100\)Å is:
\(\Rightarrow \frac{\mathrm{hc}}{\lambda}=4.845 \times 10^{-19} \mathrm{~J}=3.024 \mathrm{eV}\)
This incident electron would emit photon from metal whose work potential is less than its energy.
Thus, it would emit photons from metals A and B.
\(\Rightarrow \frac{\mathrm{hc}}{\lambda}=4.845 \times 10^{-19} \mathrm{~J}=3.024 \mathrm{eV}\)
This incident electron would emit photon from metal whose work potential is less than its energy.
Thus, it would emit photons from metals A and B.
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
- Two identical drops of water are falling through air with steady velocity ' \(V\) '. If the two drops come together to form a single drop. The new velocity of the single drop isMHT CET 2024 Medium
- For a body performing simple harmonic motion, its potential energy is \(E_x\) at displacement \(x\) and \(\mathrm{E}_{\mathrm{y}}\) at displacement y from mean position. The potential energy \(\mathrm{E}_0\) at displacement \((\mathrm{x}+\mathrm{y})\) isMHT CET 2024 Medium
- Two capillary tubes A and B of the same internal diameter are kept vertically in two different liquids whose densities are in the ratio \(4: 3\). If the surface tensions of these two liquids are in the ratio \(6: 5\), then the ratio of rise of liquid in capillary A to that in B is (assume their angles of contact are nearly equal)MHT CET 2024 Medium
- A galvanometer of resistance is connected to a battery of emf with resistance in series. A full scale deflection of 20 divisions is obtained in the galvanometer. To reduce the deflection to 10 divisions, the resistance in series required isMHT CET 2016 Medium
- 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.MHT CET 2021 Easy
- The resultant gate and its Boolean expression in the given circuit is
MHT CET 2024 Easy
More PYQs from MHT CET
- \(\lim _{n \rightarrow \infty}\left[\frac{1}{1-\mathrm{n}^4}+\frac{8}{1-\mathrm{n}^4}+\ldots \ldots \ldots \ldots . .+\frac{\mathrm{n}^3}{1-\mathrm{n}^4}\right]=\)MHT CET 2025 Medium
- An open U-tube contains mercury. When \(11.2 \mathrm{~cm}\) of water is poured into one of the arms of the tube, how high does the mercury rise in the other arm from its initial unit?MHT CET 2007 Easy
- Which group from following is responsible for (-)R effect?MHT CET 2021 Easy
- An a.c. voltage source \(\mathrm{V}=\mathrm{V}_0 \sin \omega \mathrm{t}\). is connected across resistance ' R ' and capacitance ' \(C\) ' in series. It is given that \(R=\frac{1}{\omega \mathrm{c}}\) and the peak current is \(\mathrm{I}_0\). If the angular frequency of the voltage source is changed to \(\left(\frac{\omega}{\sqrt{3}}\right)\), then the new peak current in the circuit isMHT CET 2024 Medium
- The function \(f(x)=\frac{\log _e(\pi+x)}{\log _e(e+x)}\) isMHT CET 2024 Medium
- Calculate the molality of a solution having freezing point depression \(3.6 \mathrm{~K}\) and freezing point depression constant \(4.8 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\).MHT CET 2022 Medium