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 Question for Class 12 Physics Chapter 6 Electromagnetic Induction
Last modified on:4 years agoReading Time:4MinutesCase Study Question for Class 12 Physics Chapter 6 Electromagnetic Induction Question 1: Read the para given below and answer the questions that follow: Self Induction. When a current I flows through a coil, flux linked with it is φ = LI, where L is a constant known as self inductance…
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Case Study Questions for Class 9 Maths Chapter 13 Surface Area and Volume
Last modified on:4 years agoReading Time:3MinutesCase Study Questions Question 1: Nakul was doing an experiment to find the radius r of a ball. For this he took a cylindrical container with radius R = 7 cm and height 10 cm. He filled the container almost half by water as shown in the figure-1. Now he dropped…
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Case Study Questions for Class 9 Maths Chapter 10 Circles
Last modified on:3 years agoReading Time:3MinutesCase Study Questions for Class 9 Maths Chapter 10 Circles Case Study Questions Question 1: Ankit visited in a mall with his father. He sees that three shops are situated at P, Q, R as shown in the figure from where they have to purchase things according to their need. Distance…
