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 12 Chapter 1 Electric Charges and Fields
Last modified on:4 years agoReading Time:31MinutesExtra Questions For Class 12 Physics Chapter 1 Electric Charges and Fields We are providing chapter-wise extra questions for class 12 physics. Students can practice these questions to score better marks in their exam. Very Short Answer Questions: Q.1. Give two points of distinction between charge and mass.Ans. Charge can be…
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Extra Questions For Class 10 Science Chapter 10 Reflection and Refraction of Light
Last modified on:5 years agoReading Time:17MinutesExtra Questions On Reflection and Refraction of Light Reflection is the bouncing back of light when it strikes on a polished surface like mirror. Laws of Reflection: (1) Angle of incidence is equal to the angle of reflection.(2) The incident ray, the reflected ray and the normal at the point of…
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Study Notes for Class 9 Science Chapter 8 Motion
Last modified on:5 years agoReading Time:18MinutesStudy Notes for Class 9 Science Chapter 8 Motion Topics to be covered: What is motion? Describing motion of a particle Position, path length and displacement Speed and Velocity Rate of change of velocity Distance-time graph Velocity-time graph Equations of Motion Uniform Circular Motion What is motion? State of Rest: An…
