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  1. Dictionary
    principal
    /ˈprɪnsɪpl/

    adjective

    • 1. first in order of importance; main: "the country's principal cities"
    • 2. denoting an original sum invested or lent: "the principal amount of your investment"

    noun

    More definitions, origin and scrabble points

  2. Quantum Numbers (Principal, Azimuthal, Magnetic and Spin) - The set of numbers used to describe the position and energy of the electron in an atom are called quantum numbers. There are four quantum numbers, namely, principal, azimuthal, magnetic and spin quantum numbers. To learn Detailed Explanation of Different Types of Quantum Numbers, Visit BYJU’S for more content.

  3. The Aufbau principle dictates the manner in which electrons are filled in the atomic orbitals of an atom in its ground state. It states that electrons are filled into atomic orbitals in the increasing order of orbital energy level. According to the Aufbau principle, the available atomic orbitals with the lowest energy levels are occupied before ...

  4. What is the Archimedes’ Principle? Archimedes’ principle states that: “The upward buoyant force that is exerted on a body immersed in a fluid, whether partially or fully submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid”.

  5. Defining the Huygens Principle. Huygens principle is a method of analysis applied to wave propagation problems both in the far-field limit and near-field diffraction and reflection. It states that: “Every point on a wavefront is in itself the source of spherical wavelets which spread out in the forward direction at the speed of light.

  6. Q. Define the following terms for a lens: (a) optical centre. (b) principal axis. (c) principal focus. (d) focal length. Q. Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram. Q. Define the following Principal axis.

  7. What is principal focus for concave lens? Name the spherical mirror which has : (a) virtual principal focus. (b) real principal focus. Q. An object is placed beyond the principal focus at a distance of 9 cm from it in front of a concave mirror on the principal axis. The image is formed beyond the principal focus at a distance of 16 cm from the ...

  8. The principle of superposition allows for the combination of two or more electric fields. “The principle of superposition states that every charge in space creates an electric field at point independent of the presence of other charges in that medium. The resultant electric field is a vector sum of the electric field due to individual charges ...

  9. A square matrix in which every element except the principal diagonal elements is zero is called a Diagonal Matrix. A square matrix D = [d ij] n x n will be called a diagonal matrix if d ij = 0, whenever i is not equal to j. There are many types of matrices like the Identity matrix. Properties of Diagonal Matrix

  10. As per Le Chatelier’s principles, the only way for equilibrium to accept more reactants is to increase product formation. The forward reaction is favoured when the concentration of the reactant is increased. The equilibrium of the reaction shift towards the use of reactants in the reaction, which decreases the concentration of the reactants.

  11. The principle can only be a noun. As a noun – the principal is the head or an important person of an organisation. As an adjective – the principal is primary, chief leading, etc. Also as a noun – it is a term used in Finance and Law referring to the loan amount and the main person responsible for the crime, respectively.

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