Inner zone of flame : :-----,outer

Write a note on flame.

Green algae usually have a rigid cell wall made of an inner layer of ____and an outer layer of_____.

Discuss the three zones of a lentic ecosystem.

Which is the hottest part in the flame of candle-----.

The correct sequence of meninges from inner to outer side is

The inner and outer radii of a spherical capacitor are r_1 and r_2 respectively. When the inner surface is earthed . The outer sphere is given a charge +Q , then the charge on the inner surface is

Consider a coaxial cable which consists of an inner wire of radius a surrounded by an outer shell of inner and outer radii b and c respectively. The inner wire carries an electric current (i_0) and the outer shell carries an equal current in opposite direction. Find the magnetic field at a distance x from the axis where b.

O is the origin & also the centre of two concentric circles having radii of the inner & the outer circle as a & b respectively. A line OPQ is drawn to cut the inner circle in P & the outer circle in Q. PR is drawn parallel to the y -axis & QR is drawn parallel to the x -axis. Prove that the locus of R is an ellipse touching the two circles. If the focii of this ellipse lie on the inner circle, find the ratio of inner: outer radii & find also the eccentricity of the ellipse.