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  • Physics of Semiconductor By HC Verma Sir -- Certification Course IITK

    his course will discuss and explain the basic Physics governing Semiconductors. Some experiments demonstrating properties of semiconductors, p-n junctions, transistors and logic gates will be performed to give more intimate feeling of the subject.​ How to Register Start Date: August 15, 2017 Duration: 11-12 weeks Prerequisites: Std 11 passed with Science stream Registration Closes: August 21, 2017 Instructor Incharge Prof. H C Verma Professor, Department of Physics, Indian Institute of Technology, Kanpur www.hcverma.in infosc@hcverma.in The discussion will be roughly at 10+2 and UG (B. Sc. and B. Tech.) first-year level course on semiconductors or electronics. Thus students of std. 12 onwards will benefit most. Teachers who teach this topic are another target group. Basics of Quantum Mechanics Energy levels in pure crystalline solids Conduction mechanism Fermi level and density of states Doping of accepter and donor impurities p-n junctions, mechanism of current under different biasing conditions Special purpose p-n junctions (Zener diodes, photodetectors, solar cell, LED etc.) Theory of transistors Applications like amplification, switching, oscillator etc Binary number system Logic gates. Certificates Certificates will be issued by the Centre for Development of Technical Education (CDTE), Indian Institute of Technology Kanpur. Two kinds of certificates will be issued to the qualifying students based on their involvement and performance. Competency Certificate This will be given to the participants who would have viewed at least 90% of the lectures and scored a minimum percentage in the quizzes which will be decided by the course instructor after the examinations. Participation Certificate This will be given to the participants who would have viewed at least 90% of the lectures. A lecture will be treated as “viewed” only if it is viewed from the beginning to the end. One can see the video in multiple sittings as the management system keeps the record of that. Please note that you will have to view the videos from the course website itself. Viewing downloaded videos or viewing them from YouTube or from others' account will not be counted for certificates.

  • External Links for Video Lectures

    Video Lectures Electric Charges; Conservation of charge, Coulomb’s law-force between two point charges, forces between multiple charges; superposition principle and continuous charge distribution. Electric field, electric field due to a point charge, electric field lines, electric dipole, electric field due to a dipole, torque on a dipole in uniform electric field. Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell (field inside and outside). Electric potential, potential difference, electric potential due to a point charge, a dipole and system of charges; equipotential surfaces, electrical potential energy of a system of two point charges and of electric dipole in an electrostatic field. Conductors and insulators, free charges and bound charges inside a conductor. Dielectrics and electric polarisation, capacitors and capacitance, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, energy stored in a capacitor. Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their relation with electric current; Ohm’s law, electrical resistance, V-I characteristics (linear and non-linear), electrical energy and power, electrical resistivity and conductivity. Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors; temperature dependence of resistance. Internal resistance of a cell, potential difference and emf of a cell,combination of cells in series and in parallel. Kirchhoff’s laws and simple applications. Wheatstone bridge, metre bridge. Potentiometer - principle and its applications to measure potential difference and for comparing emf of two cells; measurement of internal resistance of a cell. Concept of magnetic field, Oersted’s experiment. Biot - Savart law and its application to current carrying circular loop. Ampere’s law and its applications to infinitely long straight wire. Straight and toroidal solenoids, Force on a moving charge in uniform magnetic and electric fields. Cyclotron. Force on a current-carrying conductor in a uniform magnetic field. Force between two parallel current-carrying conductors-definition of ampere. Torque experienced by a current loop in uniform magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter. Current loop as a magnetic dipole and its magnetic dipole moment. Magnetic dipole moment of a revolving electron. Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis. Torque on a magnetic dipole (bar magnet) in a uniform magnetic field; bar magnet as an equivalent solenoid, magnetic field lines; Earth’s magnetic field and magnetic elements. Para-, dia- and ferro - magnetic substances, with examples. Electromagnets and factors affecting their strengths. Permanent magnets. Electromagnetic induction; Faraday’s laws, induced emf and current; Lenz’s Law, Eddy currents. Self and mutual induction. Alternating currents, peak and rms value of alternating current/voltage; reactance and impedance; LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits, wattless current. AC generator and transformer. Basic idea of displacement current, Electromagnetic waves, their characteristics, their transverse nature (qualitative ideas only). Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses. Ray Optics:: Reflection of light, spherical mirrors, mirror formula. Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lensmaker’s formula. Magnification, power of a lens, combination of thin lenses in contact combination of a lens and a mirror. Refraction and dispersion of light through a prism. Scattering of light - blue colour of sky and reddish apprearance of the sun at sunrise and sunset. Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers. Wave optics: Wave front and Huygen's principle, reflection and refraction of plane wave at a plane surface using wave fronts. Proof of laws of reflection and refraction using Huygen's principle. Interference Young's double slit experiment and expression for fringe width, coherent sources and sustained interference of light. Diffraction due to a single slit, width of central maximum. Resolving power of microscopes and astronomical telescopes. Polarisation, plane polarised light Brewster's law, uses of plane polarised light and Polaroids. Dual nature of radiation. Photoelectric effect, Hertz and Lenard’s observations; Einstein’s photoelectric equation-particle nature of light. Matter waves-wave nature of particles, de Broglie relation. Davisson-Germer experiment (experimental details should be omitted; only conclusion should be explained). Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen spectrum. Composition and size of nucleus, atomic masses, isotopes, isobars; isotones. Radioactivityalpha, beta and gamma particles/rays and their properties; radioactive decay law. Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number; nuclear fission, nuclear fusion. Energy bands in conductors, semiconductors and insulators (qualitative ideas only) Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier; Special purpose p-n junction diodes: LED, photodiode, solar cell and Zener diode and their characteristics, zener diode as a voltage regulator. Junction transistor, transistor action, characteristics of a transistor and transistor as an amplifier (common emitter configuration), basic idea of analog and digital signals, Logic gates (OR, AND, NOT, NAND and NOR). Elements of a communication system (block diagram only); bandwidth of signals (speech, TV and digital data); bandwidth of transmission medium. Propagation of electromagnetic waves in the atmosphere, sky and space wave propagation, satellite communication. Need for modulation, amplitude modulation Physics - scope and excitement; nature of physical laws; Physics, technology and society. Need for measurement: Units of measurement; systems of units; SI units, fundamental and derived units. Length, mass and time measurements; accuracy and precision of measuring instruments; errors in measurement; significant figures. Dimensions of physical quantities, dimensional analysis and its applications. Frame of reference, Motion in a straight line: Position-time graph, speed and velocity. Elementary concepts of differentiation and integration for describing motion.Uniform and non-uniform motion, average speed and instantaneous velocity. Uniformly accelerated motion, velocity time and position-time graphs. Relations for uniformly accelerated motion (graphical treatment). Scalar and vector quantities; Position and displacement vectors, general vectors and their notations; equality of vectors, multiplication of vectors by a real number; addition and subtraction of vectors. Relative velocity. Unit vector; Resolution of a vector in a plane - rectangular components. Scalar and Vector product of vectors. Motion in a plane, cases of uniform velocity and uniform acceleration-projectile motion. Uniform circular motion. Intuitive concept of force. Inertia, Newton's first law of motion; momentum and Newton's second law of motion; impulse; Newton's third law of motion. Law of conservation of linear momentum and its applications. Equilibrium of concurrent forces. Static and kinetic friction, laws of friction, rolling friction, lubrication. Dynamics of uniform circular motion: Centripetal force, examples of circular motion (vehicle on a level circular road, vehicle on banked road). Work done by a constant force and a variable force; kinetic energy, work-energy theorem, power. Notion of potential energy, potential energy of a spring, conservative forces: conservation of mechanical energy (kinetic and potential energies); non-conservative forces: motion in a vertical circle; elastic and inelastic collisions in one and two dimensions. Centre of mass of a two-particle system, momentum conservation and centre of mass motion. Centre of mass of a rigid body; centre of mass of a uniform rod. Moment of a force, torque, angular momentum, laws of conservation of angular momentum and its applications. Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions. Moment of inertia, radius of gyration.Values of moments of inertia, for simple geometrical objects (no derivation). Statement of parallel and perpendicular axes theorems and their applications. Keplar's laws of planetary motion.The universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth. Gravitational potential energy and gravitational potential. Escape velocity. Orbital velocity of a satellite. Geo-stationary satellites. Elastic behaviour, Stress-strain relationship, Hooke's law, Young's modulus, bulk modulus, shear modulus of rigidity, Poisson's ratio; elastic energy. Pressure due to a fluid column; Pascal's law and its applications (hydraulic lift and hydraulic brakes). Effect of gravity on fluid pressure. Viscosity, Stokes' law, terminal velocity, streamline and turbulent flow, critical velocity.Bernoulli's theorem and its applications. Surface energy and surface tension, angle of contact, excess of pressure across a curved surface, application of surface tension ideas to drops, bubbles and capillary rise. Heat, temperature, thermal expansion; thermal expansion of solids, liquids and gases, anomalous expansion of water; specific heat capacity; Cp, Cv - calorimetry; change of state - latent heat capacity. Heat transfer-conduction, convection and radiation, thermal conductivity, Qualitative ideas of Blackbody radiation, Wein's displacement Law, Stefan's law, Green house effect. Thermal equilibrium and definition of temperature (zeroth law of thermodynamics).Heat, work and internal energy. First law of thermodynamics. Isothermal and adiabatic processes. Second law of thermodynamics: reversible and irreversible processes. Heat engine and refrigerator. Equation of state of a perfect gas, work done in compressing a gas. Kinetic theory of gases - assumptions, concept of pressure. Kinetic interpretation of temperature; rms speed of gas molecules; degrees of freedom, law of equi-partition of energy (statement only) and application to specific heat capacities of gases; concept of mean free path, Avogadro's number. Oscillations and Waves Oscillations Periodic motion - time period, frequency, displacement as a function of time. Periodic functions. Simple harmonic motion (S.H.M) and its equation; phase; oscillations of a spring-restoring force and force constant; energy in S.H.M. Kinetic and potential energies; simple pendulum derivation of expression for its time period. Free, forced and damped oscillations (qualitative ideas only), resonance. Wave motion. Transverse and longitudinal waves, speed of wave motion. Displacement relation for a progressive wave. Principle of superposition of waves, reflection of waves, standing waves in strings and organ pipes, fundamental mode and harmonics, Beats, Doppler effect.

  • Free NCERT Based Software With Solutions

    Register in Faculty Section and Get Free Software fot Faculties in Which You get complete NCERT Book with Numerical Problems and Solutions.

  • Important: IITs Closing Rank 2017

    IIT B 4534 IIT Roorkee 10639 IISc Banglore 28829 IIT Kharagpur 11344 IIT Madras 8001 IIT BHU 9326 IIT Kanpur 6396 IIT Guwahati 5787 IIT D 5079 IIT Goa 7032 IIT Indore 7292 IIT Palakkad 8111 IIT Jammu 8309 IIT Bhilai 7564 IIT Patna 7478 IIT Jodhpur 6099 IIT Ropar 7104 ISM Dhanbad 8871 IIT Hydrabad 5977 IIT Dharwad 7586 IIT Tirupati 8030 IIT Mandi 7098 IIT Bhubneshwar 7999 For More Detail Visit http://josaa.nic.in/Result/result/OpeningClosingRank.aspx

  • Scholarship for College and University Students

    The Scheme is in operational since 2008. The objective of the scheme is to provide financial assistance to the meritorious students having family income of less than Rs.6 lakh per annum, to meet a part of their day-to-day expenses while pursuing higher studies. Annual target is 82000 scholarships per year (41000 for boys and 41000 for girls) which has been divided amongst the State Education Boards based on the State’s population in the age group of 18-25 years. Students who are above 80th percentile of successful candidates in the relevant stream from a particular Board of Examination in class XII and pursuing regular course and not availing benefit of any other scholarships, are eligible to apply under this Scheme. The rate of scholarship is Rs. 10,000/- per annum for the first three years and Rs. 20,000/- per annum for the fourth and fifth year.

  • Free education for girls from Nursery to PhD In Punjab

    In order to promote English in schools, a pilot project from July onwards will take place in all the government schools of Punjab.

  • KEAM 2017: Seat allotment registrations begin at cee.kerala.gov.in

    All the candidates can apply for the KEAM 2017 seat allotment registrations at cee.kerala.gov.in

  • Online Free Test for AIPMT and other Competative Exams

    Join NEET Online Test Series for Free Step 1: Create your account, visit https://goo.gl/LB1m8N Step 2: WhatsApp Name, email id to +91-9155974886 Course Details: https://goo.gl/AYPmbk

  • PAHUNT by Professional Examination Board

    म.प्र. प्री-आयुर्वेद, होम्योपैथी, यूनानी, प्राकृतिक चिकित्सा एवं योग स्नातक प्रवेश परीक्षा (पीएएचयूएनटी)-2017 MP Pre Ayurved Homeopathy Unani Naturopathi Exam 2017.

  • ORS IIT Adv Answer Key

    Online display of ORS will be available from 31-05-2017

  • Result Declaration of IIT Adv

    online IIT Advance Result to be Declare on 11'Jun 17.

  • CBSE 12 Result Declared

    The Central Board of Secondary Education will be declaring results of the CBSE Class XII exams on......

  • MP Board 12 Result Declared

    All appeared student now check their MPBSE 12th Result 2017 with help of official portal. The board provides good facility to all students for downloading MPBSE HSSC Result Name Wise, Roll No Wise, Center Wise and other.

  • JEE Main 2017 Results Declared

    JEE mains Exam Results declared by CBSE on 27th April. Visit the official website for search result.