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Direct the light reflected by the mirror on to a sheet of paper held close to the mirror. Move the sheet of paper back and forth gradually until you find on the paper sheet a bright, sharp spot of light. Hold the mirror and the paper in the same position for a few minutes.
- 11.4 EXPERIMENTAL STUDY OF PHOTOELECTRIC EFFECT
- 11.4.2 Effect of potential on photoelectric current
- SUMMARY
- POINTS TO PONDER
Figure 11.1 depicts a schematic view of the arrangement used for the experimental study of the photoelectric effect. It consists of an evacuated glass/quartz tube having a thin photosensitive plate C and another metal plate A. Monochromatic light from the source S of sufficiently short wavelength passes through the window W and falls on the photos...
We first keep the plate A at some positive potential with respect to the plate C and illuminate the plate C with light of fixed frequency n and fixed intensity I 1. We next vary the positive potential of plate A gradually and measure the resulting photocurrent each time. It is found that the photoelectric current increases with increase in positiv...
The minimum energy needed by an electron to come out from a metal surface is called the work function of the metal. Energy (greater than the work function fo) required for electron emission from the metal surface can be supplied by suitably heating or applying strong electric field or irradiating it by light of suitable frequency. Photoelectric ef...
Free electrons in a metal are free in the sense that they move inside the metal in a constant potential (This is only an approximation). They are not free to move out of the metal. They need additional energy to get out of the metal. Free electrons in a metal do not all have the same energy. Like molecules in a gas jar, the electrons have a certain...
Nov 6, 2023 · Chapter 11: Thermal Properties of Matter. Chapter 12: Thermodynamics. Chapter 13: Kinetic Theory. Chapter 14: Oscillations and Waves. Chapter 15: Ray Optics and Optical Instruments. Class 11 Physics NCERT Book Part 1 PDF Download. Class 11 Physics NCERT Book Part 2 PDF Download. NCERT Answers Part 1. NCERT Answers Part 2.
Jul 12, 2019 · NCERT Books for Class 11 Physics (English Medium) Chapter 1: Physical World. Chapter 2: Units and Measurements. Chapter 3: Motion in a Straight Line. Chapter 4: Motion in a Plane. Chapter 5: Laws of Motion. Chapter 6: Work, Energy and Power. Chapter 7: System of Particles and Rotational Motion. Chapter 8: Gravitation.
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Apr 23, 2024 · The complete NCERT books for class 11 Physics is as follows. Chapter 1 Units and Measurements. Chapter 2 Motion in a Straight Line. Chapter 3 Motion in a Plane. Chapter 4 Laws of Motion. Chapter 5 Work, Energy and Power. Chapter 6 System of Particles and Rotational Motion. Chapter 7 Gravitation.
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Download NCERT Solutions for Class 11 Physics to speed up the exam preparation. NCERT Solutions Class 11 Physics. NCERT Solutions Class 11 Physics is an important study material which helps students to master the subject. Physics is a crucial subject from the exam perspective, which is difficult to master as it deals with various properties of ...
