Exemplar Problem - NCERT
Model Question Papers Books Indent Form School Kits Exemplar Problems Laboratory Manuals 50 years of NCERT Results Framework Document. ... Class IX; Class X; Class XI; Class XII; …
Example 11 Find the derivative of f(x) = xn, where is positive integern , by first principle. Solution By definition, f′(x) = f x h f x( ) ( ) h + − = ( ) x h xn n h + − Using Binomial theorem, we have (x …
Exemplar Problems–Physics 10 2.31 Give an example of (a) a physical quantity which has a unit but no dimensions. (b) a physical quantity which has neither unit nor dimensions. (c) a …
Exemplar Problems–Physics 24 (b) Earth also moves in circular orbit around sun o nce every year with on orbital radius of 1.5 10× 11m. What is the acceleration of earth (or any object on the …
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SEQUENCE AND SERIES
148 EXEMPLAR PROBLEMS – MATHEMATICS The sum S n of the first n terms of an A.P. is given by S n = [ ] 2 ( 1) ( ) 2 2 n n a n d a l+ − = + , where l = a + (n – 1) d is the last terms of …
7.11 The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it ? (a) The forces may be acting radially from a point on the axis. (b) The …
78 EXEMPLAR PROBLEMS – MATHEMATICS When D < 0, roots of the quadratic equation are non real (or complex). 2. Let α, β be the roots of the quadratic equation ax2 + bx + c = 0, then …
40 EXEMPLAR PROBLEMS – MATHEMATICS Solution Given that circular wire is of radius 3 cm, so when it is cut then its length = 2 π × 3 = 6 π cm. Again, it is being placed along a circular …
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Exemplar Problems–Physics 18 LA 3.23 It is a common observation that rain clouds can be at about a kilometre altitude above the ground. (a) If a rain drop falls from such a height freely …