The stopping potential V 0 for photoelectric emission from a metal surface is plotted along y-axis and frequency v of incident light along x-axis. What is the stopping potential for sodium? 4.Nature of cathode material. Above the threshold frequency, the maximum kinetic energy of the emitted photoelectrons depends on the frequency of the incident light, but is independent of the intensity of the incident light so long as the letter is not too high. PDF assessment id-124 - NPTEL The potential difference at which the photocurrent stops flowing is called the stopping potential. The anode and cathode are enclosed in an evacuated glass tube. The stopping potential is related to the maximum kinetic energy of the ejected photoelectrons. PDF Chapter 1 Photoelectric E ect - Physics | William & Mary Answer. 6.2 Photoelectric Effect - University Physics Volume 3 ... The emission of free electrons from a metal surface when the light is incident on it is called the photoemission or the photoelectric effect. Dual Nature of Radiation and Matter Class 12 Notes, Physics, Term 2. Stopping potentials experiment. (A) Frequency of incident light. The photoelectric effect is the emission of electrons by substances, especially metals, when light falls on their surfaces. Physics MCQ on Photoelectric Effect for NEET, JEE, Medical ... Photoelectrons stopping potential depends on _____. Physics MCQs for Class 11 With Answers Pdf Question 5. 3.Photoelectrons stopping potential depends on. When the Click here to go to stopping potential. a) Frequency of incident light and nature of the cathode material b) The intensity of the incident light c) The frequency of the incident light d) Nature of cathode material Depends upon the intensity of the incident light. The photoelectric effect equation can be written as eV s = hf - W Frequency of incident light and nature of the cathode material b. 2003] A) Both A and B are true done clear. If the light is below than a certain frequency, no matter how intense , electrons will not be emitted. [EAMCET (Engg.) The frequency of the incident light Frequency of incident light and nature of the cathode material. Stopping potential will be same for the same frequency. Stopping potential for photoelectrons (1) Does not depend on the frequency of the incident light (2) Does not depend upon the nature of the cathode material (3) Depends on both the frequency of the incident light and nature of the cathode material (4) Depends upon the intensity of the incident light. Planck's constant is given by Stopping potential depends upon. Photoelectrons stopping potential depends on. Stopping potential for photoelectrons. Photoelectrons stopping potential depends on (A) Frequency of incident light and nature of the cathode material (B) The intensity of the incident light (C) The frequency of the incident light (D) Nature of cathode material. It is a measure of the maximum kinetic energy of the electrons emitted as a result of the photoelectric effect. When the potential on this capacitance reaches the stopping potential of the photoelectrons, the current decreases to zero, and the . The intensity of incident light C. The frequency of incident light D. Nature of cathode material ANSWER: A The stopping potential value is 0.6 V when the light source is kept at a distance of 20 cm. If a stopping potential of 1.30 V is required, what is the wavelength of the incoming monochromatic light? 497 nm C. 744 nm D. 1421 nm E. 1812 nm 1.Frequency of incident light and nature of the cathode material. (b) Since, eV 0 = 1 2 mv 2 max where, is the maximum energy of the emitted photo electrons and V 0 is the stopping potential, the stopping potential is 2V. . The notion of light quantization was first introduced by Planck. Stopping potential at threshold frequency is zero and the stopping potential varies directly with the frequency of incident radiation. 11) The retarding potential required to stop the emission of photoelectrons when a photosensitive material of work function 1.2 ev is irradiated with ultraviolet rays of wave length 2000 ALI. MCQs on Photoelectric Effect For NEET. The plate is called the "emitter". What Lenard found was that the intensity of the incident light had no effect on the maximum kinetic energy of the photoelectrons. If V º is the stopping potential, then this potential difference multiplied by the electric charge gives the kinetic energy of the most energetic photoelectrons. Overview of Stopping Potential In case of stopping potential, the value of retarding potential difference between two plates is sufficient to stop the most energetic photoelectrons emitted. A. The Stopping Potential depends on the incident photon intensity. For frequencies ν3 > ν2 > ν 1, the corresponding stopping potentials are in the same order (Vo )3 > (Vo )2 > (Vo )1. (h = 6.63 ´ 10-34 J×s, c = 3.00 ´ 108 m/s, 1 eV = 1.60 ´ 10-19 J and 1 nm = 10-9 m) A. Since, the emitted electrons from a metal surface have an energy distribution, the minimum energy in this distribution being zero, the energy of slowest photoelectrons is also zero. Find the maximum kinetic energy of the photoelectrons emitted when light of frequency 1.5 x 10^15 Hz is directed on a Copper surface. (D) Number of incident photons. Answer: (a) Frequency of incident light and nature of the cathode material When proper positive potential is applied to collector C, all the photoelectrons are attracted towards it and the maximum current recorded by the micro-ammeter gives an idea of the number of photo electrons.When negative potential is applied to the collector, . Stopping Potential. Frequency of incident light and nature of cathode material B. When the potential difference across the tube is increased , the Photo current increases and finally reaches a maximum value (Is) which depends on the intensity of light . It is concluded from the graph that, the maximum kinetic energy of the photoelectrons varies . Light of a wavelength 2000 falls on an aluminum surface. The stopping potential is defined as the potential necessary to stop any electron (or, in other words, to stop even the electron with the most kinetic energy) from 'reaching the other side'. Stopping potential for photoelectrons [MP PET 1994] A) . In photoelectric effect electrons are emitted from the surface of a metal when light of a certain frequency falls on it. The . The results are shown on the graph. Given: Stopping potential = V s = 3 V, work . This equation, due to Einstein in 1905, explains the properties of the photoelectric effect quantitatively. The stopping potential does not change with the radiation intensity because the kinetic energy of photoelectrons (see Equation 6.14) does not depend on the radiation intensity. Assertion: Stopping potential depends upon the frequency of incident light but is independent of the intensity of the light. Depends on both the frequency of the incident light and nature of the cathode material. Photoelectrons stopping potential depends on _____. But the stopping potential does depend on the kinetic energy of the electrons. In aluminum 4.2 eV are required to remove an electron. The stopping potential is the voltage between the metal surface and a cathode, placed close to the surface, in a vacuum, which just stops them from producing a current. The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. d)The Stopping Potential depends on the incident photon wavelength. Electron: It is an elementary particle having a negative charge of 1.60217662 × 10-19 coulombs and mass 9.10938356 × 10-31 kilograms . What is the cut off frequency of sodium? Stopping potential is defined as the voltage difference that . Photoelectrons stopping potential depends on: The intensity of the incident light. The maximum kinetic energy of a stream of photoelectrons (K max)…is determined by measuring the stopping potential (V 0) the applied voltage needed keep the photoelectrons trapped in the photoemissive surface . You will see it immediately jump up to some non-zero value and then, depending on the light intensity, it may take a few (sometime as long as 30 - 40 seconds) to settle at its final value. The photodiode tube and its associated electronics have a small capacitance which becomes charged by the photoelectric current. Photoelectrons stopping potential depends on a. So its curves 'a' and 'b' which have same frequency but different intensities. A photon is an elementary particle. The potential V of the supply is varied and the current is measured. Home Data Structure Singly Linked List Data Structure in C Circular Linked List in data Structure Doubly Linked List in data structure Array Data structure String Data structure Stack Implementation by array Stack implementation by Linked list Linear Queue Implemented by Array Queue . In terms of their behavior and their properties, photoelectrons are no . . Saturation current depends on the intensity of light incident. Stopping potential will be same for the same frequency. Answer. Nature of cathode material. The energy of the electrons would depend on the intensity of the wave and not the frequency. If the power supply is wired such that it makes the collector negative, then it's harder for ejected electrons to bridge the gap. But some of them with high kinetic energy are still able to reach the plate. Photoelectric Effect : The phenomenon of emission of photoelectron from the surface of metal, when a light beam of suitable frequency is incident on it, is called photoelectric effect. A straight line is obtained as shown. Light of wavelength 469 nm shines on the cathode and causes electrons to be ejected from the sodium metal. From the graph, it is found that higher the frequency of the incident radiation, higher is the value of stopping potential Vo. Complete answer: Given, the maximum kinetic energy: K max = 4 . Reason : The maximum kinetic energy of the photoelectrons is proportional to stopping potential. . Nature of cathode material. The intensity of the incident light c. The frequency of the incident light d. Nature of cathode material. Stopping potential depend upon frequency of incident light. low work function ˚. EQ - Explain why excited atoms only emit certain frequencies of radiation . low work function ˚. Show Answer. is: No, the answer is incorrect. Characteristics of the Photoelectric Effect: For a given metallic surface, photo-electrons are emitted only when the frequency of incident light is greater than or equal to a certain minimum frequency (ν o . Ans: The stopping potential is 2.54 V. When radiation of certain wavelength shines on the cathode of the photoelectric cell, the photocurrent produced can be reduced to zero by applying stopping potential of 3 V. If the work function of the photo emitter is 3.63 eV, find the frequency of radiation. Does not depend on the frequency of the incident light. Answer: K.E. What is the kinetic energy of 3.The frequency of the incident light. . Hint Understand the general photoelectric experiment performed by Rudolf hertz and the model proposed by Albert Einstein. Does not depend upon the nature of the cathode material. This gives us the expression for the kinetic energy of photoelectrons, which explicitly depends on the frequency of . 4.The stopping potential value is 0.6 V when the light source is kept at a distance of 20 cm. Physics, Term 2 their behavior and their properties, photoelectrons are no //thefactfactor.com/facts/pure_science/physics/stopping-potential/4892/ '' > stopping depends. Independent of the incident light c. the frequency of the photoelectrons, which explicitly depends on both frequency., stable voltage value on the anode Topic 5: Wave-Particle Duality and particle nature of cathode material. atoms. 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