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.
-
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…
-
MCQ Questions for Class 8 Science Chapter 12 Friction
Last modified on:2 years agoReading Time:11MinutesMCQ Questions for Class 8 Science Chapter 12 Friction Here we are providing mcq questions for class 8 science. In this article, we are covering Class 8 Science Chapter 12 Friction. Q.1 Force of friction is directly proportional to(A) size(B) area(C) weight(D) all these factors of the moving body ➤ Show…
-
Assertion Reason Questions for Class 8 Science Chapter 2 Microorganisms – Friend and Foe
Last modified on:3 years agoReading Time:5MinutesAssertion Reason Questions for Class 8 Science Chapter 2 Microorganisms – Friend and Foe Here we are providing assertion reason questions for class 8 science. In this article, we are covering Class 8 Science Chapter 2 Microorganisms – Friend and Foe. Directions: The question below consists of an assertion and a…
