The drift speed is defined as `v_(d)=(Delta l//Delta t)`where `(Delta l)is the distance drifted in a long time `(Delta t).`Why don't we define the drift speed as the limit of `(Delta l//Delta t)`as (Delta t (rarr)0)?

Let 'l' is the length of median from the vertex A to the side BC of a Delta ABC . Then

An element Delta l = Delta x hat i is placed at the origin and carries a large current I= 10 A( figure). What is the magnetic field on the y - axis at a distance of 0.5 m. Delta x = 1 cm

The base of prism is equilateral triangle. The distance from the centre of one base to one of the vertices of the other base is ldot Then altitude of the prism for which the volume is greatest is l/2 (b) l/(sqrt(3)) (c) l/3 (d) l/4

The sides of a triangle are in A.P. and its area is 3/5t h of the an equilateral triangle of the same perimeter, prove that its sides are in the ratio 3:5:7