CENTRE POINT GROUP OF STUDIES

Electric potential: The electric potential at a point in an electric field is defined as the amount of work done per unit positive test charge in moving it from infinity to that point against the electrostatic force due to the electric field. Equipotential surface: Any surface which has same electrostatic potential at every point is called an equipotential surface. Dielectric material: Dielectrics are insulators which on applying electric field, induced charges of opposite kinds develop on their opposite faces. Polar dielectric: A dielectric, in the atom or molecules of which, the centres of gravity of positive and negative charges do not coincide is called a polar dielectric. Non-Polar dielectric: A dielectric in the atoms or molecules of which, the centres of gravity of positive and negative charges coincide is called a non-polar dielectric. Electric Capacitance: The capacitance of a conductor may be defined as the ratio of the electric charge on it to its potential du...

Electrostatics:  Part-I Important definitions: Electric charge: The property of protons and electrons which gives rise to electric force between them is called electric charge. Relative permittivity or dielectric constant: It is defined as the ratio of the force between two charges placed at a certain distance apart in air to the force between the same two charges placed the same distance apart in that medium. Electric field intensity: The electric field intensity at a point due to a source charge may be defined as the force experienced per unit positive test charge placed at that point without disturbing the source charge. Electric field lines:  An electric line of force is the path along which a unit positive charge would move, if it is free to do so. Electric dipole: A system of two equal and opposite charges separated by a certain distance is called an electric dipole. Electric dipole moment: It is defined as the product of either charge a...

NOTICE Thoubal, the 11 January 2017 REGISTRATION OPEN FOR 3RD FOUNDATION COURSE         It is hereby informed to all that the 3rd Foundation Course for class XII Science (COHSEM) and Class X (BOSEM) will be started from the 23 January 2017. Interested candidates and parents may approach to the office of the undersigned or contact the given address LAST DATE OF REGISTRATION   : 20  January 2017   With regards, Management  CPGS

2015 Mathematics 1.        Let p(x) be any polynomial of degree greater than or equal to one and a   be any real number. If p(x) is divided by the polynomial   x-a , then the remainder is equal to a)        P(-a) b)        P(a) c)        –p(a) d)        –p(-a) 2.        The sum of the roots of the quadratic equation ax 2 + bx + c   = 0 a)        b/a b)        –b/a c)        c/a d)        –c/a 3.        The 6 th and 17 th terms of an AP are 21 and 54 respectively. The first term of the AP is a)        6 b)        4 c)     ...