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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Important Questions For Class 10 Science Chapter 5- Periodic Classification of Elements
Last modified on:5 years agoReading Time:16MinutesQ1. Give one example of Döbereiner’s Triad. Ans. Li, Na, K 7 23 39 Q2. How many triads could Döbereiner identify from the existing elements then? Ans. Döbernier could identify only three triads. Q3. What is the limitation of Döbereiner triads? Ans. He failed to arrange all the elements in triads…
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Important Questions For Class 10 Science Chapter 4- Carbon and its Compounds
Last modified on:5 years agoReading Time:10MinutesVERY SHORT ANSWER TYPE QUESTIONS (1 Mark) Q1. What is a hydrocarbon?Ans. It is a compound of hydrogen and carbon. Q2. Give different forms in which carbon occurs in nature.Ans. Carbon occurs in free form e.g., graphite and diamond in combined form like carbon dioxide, carbonates, etc.In earth’s crust–0.02% and in…
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How can you calculate JEE Main 2019 Rank based on NTA Percentile?
Last modified on:5 years agoReading Time:5MinutesThe JEE Main Result for January 2019 session was declared on 19th January 2019 so now to answer the big question that is on everybody’s mind is that How can we calculate JEE Main Rank based on NTA percentile? NTA has released the percentile score for the JEE Main January session.…
