MHT CET · Physics · Dual Nature of Matter
The stopping potential for a photelectric emission process is 10 V . The maximum kinetic energy of the electrons ejected in the process is [Charge on electron \(\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}\) ]
- A \(3.2 \times 10^{-19} \mathrm{~J}\)
- B \(1.6 \times 10^{-19} \mathrm{~J}\)
- C \(1.6 \times 10^{-18} \mathrm{~J}\)
- D 0 J
Answer & Solution
Correct Answer
(C) \(1.6 \times 10^{-18} \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
Maximum kinetic energy is given by,
\(\begin{aligned}
& \text { (K.E. })_{\text {max }}=\mathrm{eV}_{\mathrm{s}} \\
& \text { (K.E. })_{\text {max }}=\left(1.6 \times 10^{-19}\right) \times 10 \\
& \text {...(given, } \mathrm{V}_{\mathrm{s}}=10 \mathrm{~V} \text { ) } \\
& \therefore \quad(\text { K.E. })_{\max }=1.6 \times 10^{-18} \mathrm{~J}
\end{aligned}\)
\(\begin{aligned}
& \text { (K.E. })_{\text {max }}=\mathrm{eV}_{\mathrm{s}} \\
& \text { (K.E. })_{\text {max }}=\left(1.6 \times 10^{-19}\right) \times 10 \\
& \text {...(given, } \mathrm{V}_{\mathrm{s}}=10 \mathrm{~V} \text { ) } \\
& \therefore \quad(\text { K.E. })_{\max }=1.6 \times 10^{-18} \mathrm{~J}
\end{aligned}\)
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
- A current 'I' flows in anticlockwise direction in a circular arc of a wire having \(\left(\frac{3}{4}\right)^{\text {th }}\) of circumference of a circle of radius R. The magnetic field ' \(B\) ' at the centre of circle is ( \(\mu_0=\) permeability of free space)MHT CET 2024 Medium
- The potential difference across the \(4 \mu \mathrm{~F}\) capacitor in the following circuit is
MHT CET 2025 Medium - The following graph represents
MHT CET 2023 Easy - An electron is projected along the axis of circular conductor carrying current ' \(I\) ' The electron will experienceMHT CET 2021 Easy
- Two rods of same length & material transfer a given amount of heat in 12 s when they are joined end to end. But when they are joined length wise parallel to each other they will transfer same amount of heat in same condition in timeMHT CET 2024 Medium
- The magnetic susceptibility of a paramagnetic material at \(-73^{\circ} \mathrm{C}\) is \(0.0075 .\) Its value at \(-173^{\circ} \mathrm{C}\) will beMHT CET 2020 Easy
More PYQs from MHT CET
- A particle of mass ' \(\mathrm{m}\) ' is executing simple harmonic motion about its mean position. If \(' A^{\prime}\) is the amplitude and ' \(T\) ' is the period of S.H.M., then the total energy of the particle isMHT CET 2020 Medium
- Identify the hetero atoms and number of double bonds respectively present in furan?MHT CET 2021 Easy
- Which of the following have the same value
(a) \(\sin 120^{\circ}\)
(b) \(\cos 930^{\circ}\)
(c) \(\tan 840^{\circ}\)
(d) \(\cot \left(-1110^{\circ}\right)\)MHT CET 2020 Easy - Which of the following factors affect molarity of solution?MHT CET 2020 Easy
- In an electrical circuit ' R ', ' L ', ' C ' and an a.c. voltage source are all connected in series. When ' \(L\) ' is removed from the circuit, the phase difference between the voltage and the current in the circuit is \(\frac{\pi}{3}\). If instead 'C' is removed from the circuit, the phase difference is again \(\frac{\pi}{3}\). The power factor of the circuit is \(\left(\tan \frac{\pi}{3}=\sqrt{3}\right)\)MHT CET 2025 Medium
- At what temperature is the R.M.S. velocity of Hydrogen molecule equal to that of an oxygen molecule at \(47^{\circ} \mathrm{C}\) ? (Molecular weight of hydrogen \(=2\), Molecular weight of oxygen \(=32\) )MHT CET 2020 Easy