COMMUNICATION SYSTEM The setup used for exchanging information between a sender and receiver is called communication system. Information is specified as a measurable quantity in the technical description and the analytical treatment of the communication system. A message can be a sequence of distinct symbols or letters single time varying quantity i.e. speech,music,etc. many function … Read more
Growth and decay of current in LR circuit Growth of current 1 and 2 are connected Current through circuit at any time t At t =0, I = 0 At t = ∞ , I = Io = (Vo/R) At any time t, where, τ = (L/R) = Inductive time constant Io = maximum value … Read more
Alternating current:An electric current whose magnitude varies continuously with time and changes its direction periodically, is called an alternating current. Alternating voltage:The voltage whose magnitude varies continuously with time and changes its direction periodically, is called an alternating voltage. Impedance: It is the measure of the opposition that a circuit offers to a current when … Read more
Electromagnetic Induction Electromagnetic induction is the phenomenon of production of electric field with the help of varying magnetic field. Magnetic Flux and Magnetic Flux Density Magnetic flux (φ) through any surface is defined as the number of magnetic lines of force crossing through that surface. the magnetic flux (φ) through the surface is defined as … Read more
Nuclear Reactions The process by which the identity of a nucleus is changed when it is bombarded by an energetic particle is called nuclear reaction. Let a nucleus X (called parent nucleus) be bombarded by an energetic particle c. The resultant nucleus after the interaction between X and a is Y (called daughter nucleus) and … Read more
Electric charge Electrostatics is a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges with no acceleration. Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. … Read more
Electric Lines of Force Electric lines of force in an electric field is defined as the paths along which a unit positive charge tends to move if it is free to do so. The tangent drawn at any point on electric line of force gives the direction of electric field intensity at that point. Note:It … Read more
Electric Field and its physical significance The space surrounding an electric charge Q in which another charge q experiences an electrostatic force of attraction or repulsion,is called the electric field of charge Q. ** Here charge Q is called the source charge and charge q is the called test charge. As we know that electrostatic … Read more
Class Test Paper- 6 English Core Class XII Time: 90 Minutes M.M: 50 General Instructions: All questions are compulsory. Separate instructions are given with each question. Read them carefully and follow them faithfully Do not exceed the prescribed word limit while answering the questions. Q1. Read the passage given below and answer the … Read more
Quantum physics or Quantum Mechanics or Quantum Theory It is the study of the microscopic world. When we talk at microscopic level, many quantities are found only in certain minimum (elementary) amounts, or integer multiples of those elementary amounts; these quantities are then said to be quantized. The elementary amount that is associated with such … Read more
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