Class 11 maths formula sheet

Quadratic Equation Formula denoted as second-degree algebraic expressions, take the form ax2+bx+ c = 0. The term "quadratic" originates from the Latin word "quadratus," meaning square.

Formulae Sheet for Physics 0.1: Physical Constants Speed of light c Planck constant Gravitation constant G Boltzmann constant k Molar gas constant R Avogadro’s number NA Charge of electron e Permeability of vacuum Permitivity of vacuum Coulomb constant Faraday constant F Mass of electron me Mass of proton mp Mass of neutron mn Atomic mass unit u Atomic mass unit u Stefan-Boltzmann constant Rydberg constant Bohr magneton Bohr radius Standard atmosphere Wien displacement constant

The set of all points in a plane, the sum of whose distances from two fixed points in the plane is constant is an ellipse. These fixed points (two) are the foci of the ellipse. When a line segment is drawn joining the two focus points, then the mid-point of this line is the center of the ellipse.