Defects of vision of human eye: The most distant point which an eye can see clearly is called the far point (F). For the normal eye the far point lies at infinity. The nearest point which an eye can see clearly is called the near point (N). For normal eye, near point lies at a […]
Explore MoreHuman eye is spherical in shape with a slight bulge at the front. Sclera: The outer part of eye is called sclera. It is white in colour with fibrous layer. The transparent part of it at the front of the outer side of the eye is called cornea. Light enters the eye through it. Its refractive index is […]
Explore MoreFriction due to relative velocity: A block A of mass M is placed on horizontal table. Another block B of mass m is places on block A as shown in figure. Now v1 and v2 (v1 < v2) are the velocities of A and B respectively. The conditions are explained below.1. The coefficient of static […]
Explore MoreA block A of mass M is placed on horizontal table. Another block B of mass m is places on block A as shown in figure. Now F force is applied on A. The conditions are explained below. 1. If there is no friction between A and B and between A and table, then A […]
Explore MoreA block A of mass M is placed on horizontal table. Another block B of mass m is places on block A as shown in figure. Now F force is applied on B. The conditions are explained below. 1. If there is no friction between A and B and between A and table, then B […]
Explore MoreFriction related concepts: 1. A car of mass m is moving with speed u and brake is applied so that it travels distance s before stop. Find frictional force and coefficient of friction between the wheel and the road. Using the equation v2 = u2 + 2as we get, 0 = u2 – 2as or, […]
Explore MoreFriction: Friction is the retarding force which acts tangentially to the contact surface when a body actually moves or tends to move over the surface of another body. Static friction: The force of friction which exactly counter-balance the applied force during the stationary state of a body is called static friction. So static friction is […]
Explore More1. Capacitors in series: Let us consider three capacitors C1, C2 and C3 respectively are connected in series in between points AB, BC, CD with a cell as shown in figure. The potential difference between points AB, BC, CD are respectively (VA – VB), (VB-VC) and (VC-VD). Q is the charge flows through the circuit. […]
Explore MoreEnergy stored in a capacitor: Let us consider initially the plates of a capacitor are uncharged and small positive charges are repeatedly transferred from one plate to the other plate. Let at any instant q be the total quantity of charge transferred and v be the potential difference between the plates. Then, q = Cv […]
Explore MoreCapacitance of a spherical capacitor (outer sphere is earthed): Let us consider A and B are the two concentric spherical shells of radii a and b respectively (b >a). Shell A is charged by Q and the outer surface of shell B is earthed. So –Q charge is induced in the inner surface of B. […]
Explore More
© 2018 – 2025 Koushi All Rights Reserved