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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Algebraic Identities
Last modified on:4 years agoReading Time:2MinutesWhat is an Algebraic Identity?An algebraic identity is an algebraic equation that is true for all values of the variables occurring in it. Important Algebraic Identities: (i) (x + y)2 = x2 + 2xy + y2 (ii) (x – y)2 = x2 – 2xy + y2 (iii) x2 – y2 = (x + y)(x – y) (iv)…
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Extra Questions for Class 10 Maths Chapter 3 Linear Equations Based on Graphical Method of Solving Linear Equations
Last modified on:4 years agoReading Time:4MinutesGraphical Method of Finding Solution of a Pair of Linear Equations To solve the pair of linear equation proceed as below. Step 1: Draw a graph for each linear equation. Step 2: Find the coordinate of the point of intersection of the two drawn lines. Step 3: The coordinates of the…
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Extra Questions for Class 10 Maths Chapter 4 Quadratic Equations Based on Nature of Roots
Last modified on:4 years agoReading Time:15MinutesExtra Questions for Class 10 Maths Chapter 4 Quadratic Equations Nature of Roots of a Quadratic Equation Let the given equation be ax2 + bx + c = 0, where a = 0. Then, the discriminant is given by D = (b2 – 4ac) . And, the roots of the given…
