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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Questions on Kinematics
Last modified on:5 years agoReading Time:24MinutesQ1. A man travels a distance of 1.5 m towards East, then 2.0 m towards South and finally 4.5 m towards East. i. What is the total distance travelled? ii. What is his resultant displacement? Q2. A scooterist covers a distance of 3 kilometers in 5 minutes. Calculate his speed in…
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CBSE 9 Physics Motion Solved Assignment
Last modified on:5 years agoReading Time:19MinutesQuestion 1. when graph is parallel to time axis, what can you say about the motion?Answer. The body remains at rest. Question 2. What is the value of acceleration, if v-t graph is a straight line parallel to the time axis? Answer. Zero, since slope is zero. Question 3. Under what…
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Class 10 Light (Reflection & Refraction) Solved Paper-2
Last modified on:5 years agoReading Time:1Minute
