Photoelectric Effect - JEE Main Previous Year Questions with Solutions

eSaral > JEE Main Previous Year Questions > Photoelectric Effect JEE Main Previous Year Questions with Solutions

JEE Main Previous Year Question of Physics with Solutions are available here. Practicing JEE Main Previous Year Papers Questions of Physics will help all the JEE aspirants in realizing the question pattern as well as help in analyzing their weak & strong areas. Get detailed Class 11th &12th Physics Notes to prepare for Boards as well as competitive exams like IIT JEE, NEET, etc. eSaral helps the students in clearing and understanding each topic in a better way. eSaral is providing complete chapter-wise notes of Class 11th and 12th for all subjects. Besides this, eSaral also offers NCERT Solutions, Previous year questions for JEE Main and Advanced, Practice questions, Test Series for JEE Main, JEE Advanced and NEET, Important questions of Physics, Chemistry, Math, and Biology and many more. Download the eSaral app for free study material and video tutorials.   Simulator   Previous Years AIEEE/JEE Mains Questions [esquestion] The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is : (hc = 1240 eV-nm) (1) 1.51 eV            (2) 1.68 eV          (3) 3.09 eV              (4) 1.41 eV #tag# [AIEEE - 2009] #sol# (4) $\mathrm{E}_{\mathrm{k}}=\frac{\mathrm{hc}}{\lambda}-\phi_{0} \Rightarrow 1.68=\frac{12400}{4000}-\phi_{0}$ By solving it $\phi_{0}=1.42 \mathrm{eV}$ [/esquestion] [esquestion] Statement-1 : When ultraviolet light is incident on a photocell, its stopping potential is V0 and the maximum kinetic energy of the photoelectrons is $\mathrm{K}_{\mathrm{max}}$. When the ultraviolet light is replaced by X-rays, both $\mathrm{V}_{0}$ and $\mathrm{K}_{\mathrm{max}}$ increase. Statement-2 : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light (1) Statement–1 is true, Statement–2 is false (2) Statement–1 is true, Statement–2 is true; Statement–2 is the correct explanation of Statement– 1 (3) Statement–1 is true, Statement–2 is true; Statement–2 is not the correct explanation of Statement– 1 (4) Statement–1 is false, Statement–2 is true #tag# [AIEEE - 2010] #sol# (1) Speed of emitted electrons is independent of frequency of incident light. [/esquestion] [esquestion] This question has Statememtn-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements. Statement–1 : A metallic surface is irradiated by a monochromatic light of frequency $\mathrm{v}>\mathrm{v}_{0}$ (the threshold frequency). The maximum kinetic energy and the stopping potential are $\mathrm{K}_{\max }$ and $\mathrm{V}_{0}$ respectively. If the frequency incident on the surface is doubled, both the $\mathrm{K}_{\max }$ and $\mathrm{V}_{0}$ are also boubled. Statement-2 : The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light. (1) Statement–1 is true, Statement–2 is true, Statement–2 is not the correct explanationof Statement– 1 (2) Statement–1 is false, Statement–2 is true (3) Statement–1 is true, Statement–2 is false (4) Statement–1 is true, Statement–2 is true, Statement–2 is the correct explanation of Statement– 1 #tag# [AIEEE-2011] #sol# (2) [/esquestion] [esquestion] The anode voltage of photocell is kept fixed. The wavelength $\lambda$ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows #tag# [AIEEE-2013] #sol# (4) For constant intensity as wavelength decreases energy of photons increases and number of photons decreases. So it may seem that current should decrease. But the probability that a photon will be successful in emitting an electron will also increase. So as wavelength decreases current increases [/esquestion] [esquestion] Radiation of wavelength $\lambda$, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength of changed to $\frac{3 \lambda}{4}$, the speed of the fastest emitted electron will be :- #tag# [JEE Main-2016] #sol# (2) $\mathrm{E}=(\mathrm{KE})_{\max }+\mathrm{f}$ $\left[\frac{\mathrm{hc}}{\lambda}=(\mathrm{KE})_{\max }+\phi\right] \ldots .$ (1) \frac{4}{3} \frac{\mathrm{hc}}{\lambda}=\left(\frac{4}{3} \mathrm{KE}_{\max }+\frac{\phi}{3}\right)+\phi [/esquestion]

Explore more resources to strengthen your JEE Main preparation:

- NCERT Solutions for Class 12 Physics — complete chapter-wise solutions including Dual Nature of Radiation

- NCERT Solutions for Class 11 Physics — Foundation Concepts for Modern Physics

-NCERT Books for Class 12 — download the official textbook chapters

🚀 Checkout eSaral Courses

eSaral's JEE program, built by IIT Bombay faculty with verified All India Ranks, gives you structured topic-wise practice, a 5-layer doubt-solving system, and Kota-quality teaching at a fraction of classroom coaching costs. Bookmark this page and revisit it the week before your exam as a quick revision reference.

JEE Main Previous Year Question of Physics with Solutions are available here. Nuclear Physics - JEE Main Previous Year Questions with Solutions

If you're revising Photoelectric Effect offline, the JEE Mains PYQ chapter-wise PDF download collection lets you move between chapters from one place.

Don't stop at Photoelectric Effect alone — our JEE Main previous year paper lets you attempt complete question sets exactly as NTA set them.