Specific Heat of a Gas For solids and liquids, we define the specific heat capacity as the quantity of energy that will raise the temperature of unit mass of the body by 1K. For gases, however, it is necessary to specify the conditions under which the change of temperature takes place, since a change of Read more about Specific Heat of a Gas[…]
Acceleration of Block on Horizontal Smooth Surface Acceleration of an object is defined as its rate of change of velocity at that instant. It is denoted as “a” and the units are. Any object experiencing an unbalanced force, constant or variable show acceleration (or) Any object undergoing a change in its velocity either magnitude or Read more about Acceleration of Block on Horizontal Smooth Surface[…]
Limitations of Dimensional Analysis Dimensional Analysis can’t derive relation or formula if a physical quantity depends upon more than three factors having dimensions. It can’t derive a formula containing trigonometric function, exponential function, and logarithmic function and it can’t derive a relation having more than one part in an equation. Although dimensional analysis is very Read more about Limitations of Dimensional Analysis[…]
Applications of Dimensional Analysis Dimensional Analysis is also called Factor Label Method (or) Unit Factor Method as we use conversion factor in order to get same units. The basic concept of dimensions is that we can add or subtract only those quantities which have same dimensions. Also, two physical quantities are equal if they have same dimensions. 1) To find Read more about Applications of Dimensional Analysis[…]
Parallelogram Law of Vector Addition If two vectors acting simultaneously at a point can be represented both in magnitude and direction by the adjacent sides of a parallelogram drawn from a point, then the resultant vector is represented both in magnitude and direction by the diagonal of the parallelogram passing through that point. If two Read more about Parallelogram Law of Vector Addition[…]
Conductivity of Semiconductor Semiconductors are the materials which have conductivity between conductors and non-conductors or insulators. In semiconductors, the conduction band electron and valence band hole participate in electrical conduction. Semiconductors can be compounds such as gallium arsenide or pure elements, such as germanium or silicon. 1) In intrinsic semiconductors ne = nh, both electron Read more about Conductivity of Semiconductor[…]
Velocity of Longitudinal Wave 1) Velocity of Sound in any Elastic Medium: It is given by . a) In solids, ; Where Y = Young’s modulus of elasticity. b) In a liquid and gaseous medium, ; where B = Bulk modulus of elasticity of liquid or gaseous medium. c) As solids are most elastic while Read more about Velocity of Longitudinal Wave[…]
Velocity of Transverse Wave In a transverse wave the particle displacement is perpendicular to the direction of wave propagation. The velocity of a transverse wave in a stretched string is: . Where, T = Tension in the string, m = Linear density of string. 1) If A is the area of cross section of the Read more about Velocity of Transverse Wave[…]
Diffraction of Light The phenomenon of diffraction was first discovered by Girmaldi. Its experimental study was done by Newton’s and young. The theoretical explanation was first given by Fresnel’s. 1) The phenomenon of bending of light around the corners of an obstacle/ aperture of the size of the wave length of the light is called Read more about Diffraction of Light[…]
Mirror Formula and Magnification Mirror formula gives the relationship between image distance, object distance and the focal length of the mirror and this formula is valid in all situations for all spherical mirrors for all positions of the object. Magnification produced by a spherical mirror gives the relative extent to which the image of an Read more about Mirror Formula and Magnification[…]