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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Introduction to Wave Optics
Last modified on:5 years agoReading Time:4MinutesNewton’s Corpuscular theory This theory was proposed by Sir Isacc Newton in 1678. According to this theory, known as corpuscular theory, light consists of stream of extremely light and tiny material particles known as corpuscles. These particles are shot out by every point of a source of light with a very…
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Introduction to Oscillatory Motion and Waves
Last modified on:5 years agoReading Time:5Minutes What do a child in a swing, the cone inside a speaker, a guitar, atoms in a crystal, the motion of chest cavities, and the beating of hearts all have in common? They all oscillate—-that is, they move back and forth between two points. Many systems oscillate, and they have…
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The Doppler Effect
Last modified on:5 years agoReading Time:7MinutesPerhaps you have noticed how the sound of a vehicle’s horn changes as the vehicle moves past you. The frequency of the sound you hear as the vehicle approaches you is higher than the frequency you hear as it moves away from you. This is one example of the Doppler effect.…
