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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Case Study Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instruments
Last modified on:4 years agoReading Time:5MinutesCase Study Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Attempt any 4 sub parts from each question. Each question carries 1 mark. Case Study Question 1: A compound microscope is an optical instrument used for observing highly magnified images of tiny objects. Magnifying power of a…
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Case Study Questions for Class 12 Chemistry Chapter 5 Surface Chemistry
Last modified on:5 years agoReading Time:8MinutesThere is Case Study Questions in class 12 Chemistry in session 2020-21. For the first time, the board has introduced the case study questions in the board exam. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question…
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Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry
Last modified on:5 years agoReading Time:5MinutesThere is Case Study Questions in class 12 Chemistry in session 2020-21. For the first time, the board has introduced the case study questions in the board exam. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question…
