5. 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) […]
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1. 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
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Dimension: 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 = = Â = length (time)-1
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Newton’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
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Some 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
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Reflection 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:
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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 of angle and it may be positive or negative. Let us consider OA and OB are
Mathematical tools and vector Class – IX Read More »
Relation 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, Â ——-
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Moment of inertia: According to Newton’s first law of motion, if there is no external force is applied on a body, the body continuous in its state of rest or of uniform motion in a straight line. The property of the body by virtue of which it tends to resist the change its state of
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Work: Work is said to be done when a force is applied on a body and the body is displaced through a certain distance in the direction of the applied force. If F is the force is applied on a body at an angle θ with displacement S, then work done on the body is
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