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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Extra Questions for Class 7 Science Chapter 14 Electric Current and Its Effects
Last modified on:2 years agoReading Time:10Minutes Extra Questions for Class 7 Science Chapter 14 Electric Current and Its Effects ‘Extra questions for Class 7 Science’ refer to additional practice questions and exercises that may go beyond the standard curriculum provided in textbooks. These questions are designed to provide students with more opportunities to practice and reinforce…
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Extra Questions for Class 7 Science Chapter 13 Motion and Time
Last modified on:2 years agoReading Time:10Minutes Extra Questions for Class 7 Science Chapter 13 Motion and Time ‘Extra questions for Class 7 Science’ refer to additional practice questions and exercises that may go beyond the standard curriculum provided in textbooks. These questions are designed to provide students with more opportunities to practice and reinforce their understanding…
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Extra Questions for Class 7 Science Chapter 12 Reproduction in Plants
Last modified on:2 years agoReading Time:10Minutes Extra Questions for Class 7 Science Chapter 12 Reproduction in Plants ‘Extra questions for Class 7 Science’ refer to additional practice questions and exercises that may go beyond the standard curriculum provided in textbooks. These questions are designed to provide students with more opportunities to practice and reinforce their understanding…
