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 and Passage Based Questions for Class 9 Maths Chapter 14 Statistics
Last modified on:4 years agoReading Time:2MinutesCase Study and Passage Based Questions for Class 9 Maths Chapter 14 Statistics Case Study Questions: Question 1: The Class teacher of Class X preparing result analysis of a student. She compares the marks of a student obtained in Class IX (2018-19) and Class X (2019-20) using the double bar graph…
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Case Study Questions for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure
Last modified on:3 years agoReading Time:4Minutes Case Study Questions for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure Case Study/Passage Based Questions: Question 1: Lewis dot structure of HCN molecule is given below. Answer questions on the basis of this structure. (i) How many electrons are involved in the sigma bond between the carbon…
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Case Study Questions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties
Last modified on:3 years agoReading Time:3Minutes Case Study Questions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties Case Study Questions: Question 1: The IE1 and IEII in kJ/mol of a few elements are given in the following table: (i) Which of the above element is likely to be alkali metal?(A) P…
