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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Problems Based on Equations of Motion for Class 9 Science
Last modified on:12 months agoReading Time:14Minutes[PDF] Download Problems Based on Equations of Motion for Class 9 Science EQUATIONS OF MOTION When an object moves along a straight line with uniform acceleration, it is possible to relate its velocity, acceleration during motion and the distance covered by it in a certain time interval by a set of…
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Problems Based on Graphical Representation of Motion for Class 9 Science
Last modified on:4 years agoReading Time:6MinutesGraphical Representation of Motion A graph represents the relation between two variable quantities in pictorial form. It is plotted between two variable quantities. The quantity that is varied our choice is called independent variable. The other quantity, which varies as a result of this change, is called dependent variable. For example,…
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Problems Based on Average Speed for Class 9 Science
Last modified on:3 years agoReading Time:9MinutesHere we have provided questions based on average speed for class 9 science. Students can solve these problems for better practice. These questions on average speed are prepared by subject expert and is very useful for class 9 studying students. Problems Based on Average Speed for Class 9 Science Q.1. A…
