Force per unit area of a charged conductor: Let us consider the electric field E at any point P very near, but outside, the surface of a charged conductor is E = E1 + E2. Where E1 is the field due to the charge of small area ds around P, and E2 due to the […]
Explore MoreSolid angle: The projection of a area divided by r2 (position vector) is called solid angle. The solid angle subtended by an area at a point O is given by Ω = . Where is the projection of area. For sphere the solid angle subtended at the centre is Ω = = = = […]
Explore More5. Oscillation of a charge: Two +q charge particles are placed at point A (0, a) and B (0, -a) on the Y axis and another charge particle –Q is released from rest at point C (b,0) on the X axis. At any instant -Q is at point D of distance x from origin. *(i) […]
Explore More1. Concept of electrostatic force: 1. Force on a point charge due to uniformly charged rod: A rod of length L is uniformly charged by Q placed at a distance D from a point charge q at P. Charge per unit length of the rod is λ = . We consider an elementary part of […]
Explore MoreDimension: All the physical quantities are derived from some fundamental quantities. Any physical quantity is expressed in terms of the product of different powers of the fundamental quantities. The exponent of fundamental quantities that represents the expression is called the dimension of that physical quantity. Consider a physical quantity speed = = = length (time)-1 […]
Explore MoreNewton’s equation:Let us consider an object AB is placed at a distance u from the pole of a concave mirror of focal length f. The image A/B/ is formed at a distance of v from the pole. Let us consider the distance between object and focus is FA = x = (u – f) and distance […]
Explore MoreSome basic numericals based on mirror formula are given in the blog of ‘Reflection through curved surface class – X‘. To get the numericals click the given button. Click here More concepts for the preparation of competitive examinations are given below. 1. A rod of length l lies along the principal axis of a concave […]
Explore MoreReflection through spherical surface: The basic definition of centre of curvature, radius of curvature, pole, aperture, principle axis, principle focus, focal plane, focal length etc. are explained in the blog of ‘Reflection through curved surface class – X‘. To get the informations click the given button. Click here Sign convention for reflection by spherical mirror: […]
Explore MoreMathematical tool like concepts of trigonometry, algebra etc are very important to solve problems in Physics. Concept of trigonometry: Trigonometry is the part of mathematics where we learn about the angle. We know that in geometry the measured angle is restricted in between to and it is positive. But in trigonometry there is no limit […]
Explore MoreRelation between object and image velocity: 1. When object is moving along the principal axis: Let us consider, a point object is moving along the principal axis of a concave mirror of focal length f. At any instant the object distance is u and image distance is v. Using mirror formula we get, ——- […]
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