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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Charging of Insulators
Last modified on:4 years agoReading Time:2Minutes 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…
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Charging by Contact
Last modified on:4 years agoReading Time:2Minutes Charging by Contact When a negatively charged ebonite rod is rubbed on a metal object, such as a sphere, some of the excess electrons from the rod are transferred to the sphere. Once the electrons are on the metal sphere, where they can move readily, they repel one another and…
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Charging by Rubbing
Last modified on:4 years agoReading Time:3Minutes Charging by Rubbing The simplest way to charge certain bodies is to rub them against each other. When a glass rod is rubbed with a silk cloth, the glass rod acquires some positive charge and the silk cloth acquires negative charge by the same amount. The explanation of appearance of…
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Laws of Motion (Study Notes)
Last modified on:5 years agoReading Time:29MinutesTopics to be covered Force and inertia, Newton’s first law of motion; Momentum, Newton’s second law of motion, Impulse; Newton’s third law of motion; Law of conservation of linear momentum and its applications; Equilibrium of concurrent forces; Static and kinetic friction, laws of friction, rolling friction, lubrication; Examples of variable mass situation. Dynamics of uniform…
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FRICTION (STUDY NOTES)
Last modified on:5 years agoReading Time:7MinutesFriction Introduction If we slide or try to slide a body over a surface the motion is resisted by a bonding between the body and the surface. This resistance is represented by a single force and is called friction. The force of friction is parallel to the surface and opposite to the direction…
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Important Questions (Management of Natural Resources)
Last modified on:8 years agoReading Time:36MinutesVERY SHORT ANSWER TYPE QUESTIONS (1 Mark) Q1. What is a natural resource? Ans.: All the material we obtain from nature and use it is called natural resource. Q2. Name two important natural resources. Ans.: Forest, Water, Wildlife. Q3. What are 3 R’s used to save environment? Ans. Reduce, Recycle and…
