Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
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Conceptual Questions Based on Class 12 Physics Dual Nature of Radiation and Matter
Last modified on:3 years agoReading Time:6MinutesConceptual Questions Based on Class 12 Physics Dual Nature of Radiation and Matter Q.1. What happens to the wavelength of a photon after it collides with an electron? Solution. A photon transfers a part of its energy to the colliding electron, so its energy decreases and consequently wavelength increases. Q.2. Why…
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Conceptual Questions Based on Class 12 Physics Wave Optics
Last modified on:3 years agoReading Time:8MinutesConceptual Questions Based on Class 12 Physics Wave Optics Here we are providing conceptual questions based on Class 12 Physics Wave Optics. Go through each and every question for better understanding. Q.1. What are the reasons to believe that light is a wave motion? Solution. Light undergoes interference, diffraction and polarization.…
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Conceptual Questions Based on Class 12 Physics Optical Instruments
Last modified on:3 years agoReading Time:10MinutesConceptual Questions Based on Class 12 Physics Optical Instruments Here we are providing conceptual questions based on class 12 physics chapter 9 Optical Instruments. These questions are prepared by experts and are very useful from exam point of view. Students can practice these questions for scoring better marks in the exam.…
