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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Case Study Questions for Class 12 Physics Chapter 10 Wave Optics
Last modified on:4 years agoReading Time:7Minutes Case Study Questions for Class 12 Physics Chapter 10 Wave Optics Question 1: Diffraction of Light:A and B went to purchase a ticket of a music programme. But unfortunately only one ticket was left. They purchased the single ticket and decided that A would be in the hall during the…
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Case Study Questions for Class 12 Physics Chapter 8 Electromagnetic Waves
Last modified on:4 years agoReading Time:9MinutesCase Study Questions for Class 12 Physics Chapter 8 Electromagnetic Waves Question 1: Laser: Electromagnetic radiation is a natural phenomenon found in almost all areas of daily life, from radio waves to sunlight to x-rays. Laser radiation – like all light – is also a form of electromagnetic radiation. Electromagnetic radiation…
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Case Study Questions for Class 12 Physics Chapter 14 Semiconductor Electronics
Last modified on:4 years agoReading Time:8MinutesCase Study Questions for Class 12 Physics Chapter 14 Semiconductor Electronics Question 1: Light Emitting Diode:It is a heavily doped p-n junction which under forward bias emits spontaneous radiation. The diode is encapsulated with a transparent cover so that emitted light can come out. When the diode is forward biased, electrons…
