Coulombs law, superposition, energy of a system of charges, basic field concept, flux, gausss law, fields and potentials around conductors, the electrostatic uniqueness theorem,rc circuits, thevenin equivalence, forces and fields in special relativity. An electric circuit is a complete path through which electricity travels circuits are made up of wires and electrical parts such as batteries, light bulbs, resistors, motors and switches a circuit diagram is a shorthand method of describing a working circuit. Pdf download pradeep kshetrapal sir genius notes jeemain. If two substances are electric charges are static i. Current electricity introduction watch more videos at comvideotutorialsindex. Potential difference v and electromotive force, emf. If a charge passes through the area in time interval at uniform rate, then current i is defined as instantaneous value of current is given by. Cbse test papers for cbse class 12 physics current electricity. Dec 15, 2017 neet physics notes current electricityelectric current electric current electric current electric current is defined as the time rate of flow of electric charge through a crosssection of the conductor. So if through a crosssection, q charge passes in time t then t q i av and instantaneous current dt dq t q ilim t u u u 0. Current strength, in a conductor, is defined as the rate of flow of charge across any cross section of the conductor. Current electricity introduction watch more videos at lecture by.
The particles which carry current in a material electrons or ions are. Current i current is the flow of charge electrons flow as a result of a. Electric current part1 2014pradeep kshetrapal physics. Download for free or view pdf file physics current electricity mcq for competitive exams. Read all the important points and chapterwise notes on viteee. Pradeep kshetrapal current electricity 3 formulas in current electricity direct current 1 electric current iqt q is charge passing in normal direction through a cross section of conductor in time t 2 drift velocity v d with electric field v d e is charge and m is mass on electron, e is electric field. Equivalent to american high school diploma if this is too basic for you, you can try the more advanced version here. Jan 19, 2020 this topic covers current electricity of o level physics. Electric current introduction classroom lecture by pradeep kshetrapal. In case of uniform flow of charge through a crosssection normal to it as. The materials which allow electric current to pass through it are called conductor. Current i current is the flow of charge electrons flow as a result of a potential difference more voltage more current units. A current of 1 a is flowing in a circuit if a charge of 1 coulomb passes any point in the circuit every second. Current electricity download free and get a copy in your email x.
Let us now see what happens to such a piece of conductor if an electric field is applied. Alternating current is when the current from the energy source goes in. Notes for neet physics current electricity, charging. Electrons flows in the direction which is opposite to the direction of electric current. Cover the important points in a clear and concise manner.
Download pradeep kshetrapal sir notes for physics iit jee. The current at a point in the circuit is the amount of charge that passes that point in one second. Free video cbse class 12 physics current electricity. Gcse revision notes physics revision notes electricity 1. The relation between the electric current and the similarly, the heat current. Providing study notes, tips, and practice questions for students preparing for their o level or upper secondary examinations. Electrostatics and current electricity mechanics1 and 2 waves and thermodynamics electricity magnetism optics and modern physics arihant books mathematics spectrum 20162017 physics. The current density vector gives current per unit area flowing through area a when it. Flow of current is flow of positive charge from the positive terminal of the battery to the negative terminal of it. In numericals we may have the situation where the amount of heat travelling to.
The energy that drives the free electrons around the circuit is known. Basic electricity fall 2011 this course module introduces the basic physical models by which we explain the flow of electricity. Class 12 physics notes on semiconductor containing top concepts like materials, circuits, semiconductors, energy band in solids, half wave rectifier, fullwave rectifier, solar cell, npn transistor etc. The time rate of flow of charge through any crosssection is called current. The flow of charges will be constant in current electricity. Current electricity, chapter notes, class 12, physics, iit. Physics notes electricity example 2 in an electrolyte. For each approved study note you will get 25 credit points and 25 activity score which will increase your profile visibility. An atom consists of protons positive, neutrons neutral, and electrons negative.
Class 12 physics notes on semiconductor containing top concepts like materials, circuits, semiconductors, energy band in solids, half wave rectifier, full. Ncert solutions for class 12 physics chapter 3 current. These ncert solutions for class 12 of physics subject includes detailed answers of all the questions in chapter 3 current electricity provided in ncert book which is prescribed for class 12 in schools. For current to flow you must have a complete circuit a power source is needed to create a potential diference when these conditions are met free electrons move about inside the metal. Current electricity and magnetism class 9 science notes. Free electron motion in a wire the free electrons in a metal have three distinct velocities associated with them. An electric circuit is a complete path through which electricity travels circuits are made up of wires and electrical parts such as batteries, light bulbs, resistors, motors and switches a circuit diagram is a shorthand method of. Which way does current flow current electrons the unit of current is the ampere a the symbol for current is i 5.
The bohr model of an atom a nucleus surrounded by shells of electrons traveling in discrete orbits is presented. An electric cell is a device which converts chemical energy into electrical energy. Comments the current flow of charge onto or off a capacitor is zero at steady state, but while the current is charging there is a current so you can follow the current flow to help you determine if two caps are in series. Current flows from the positive terminal of a battery through the external circuit the light globe to the negative terminal. Neet physics notes current electricityelectric current. This article is concerned with the analysis of simple direct current circuits of two types. When you rub a plastic rod with a cloth, it becomes negatively charged. Current electricity, chapter notes, class 12, physics. Neet physics notes current electricityelectric current electric current electric current electric current is defined as the time rate of flow of electric charge through a crosssection of the conductor. Pdf download pradeep kshetrapal notes for physics iit. Physics for iit jee by subhashish sir south bangalore skm.
Selina concise physics class 9 icse solutions current. Study of electricity in which electrostatic series. The current density vector gives current per unit area flowing through area a when it is held normal to the direction of charge flow. Cbse test papers class 12 physics current electricity. Visit examrace for more files and information on sampleobjectivequestions. Tips and notes for english, general paper, and composition writing are also provided. Revision notes on electric current, resistance, chemical effect of current and heating effect of current provides by askiitians. The potential difference or voltage, v between 2 points is defined as the work done, w in taking 1 c of positive charge from the lower potential to the point of higher potential in a circuit, it is the energy sources that supply energy, not the electric charges.
Current electricity notes 3 kirchoffs laws current law. Explain to the students about direct current and alternating current. Lalu 5771 aclr 89103 tc lr pm np pu am cm bk cf es fm md no rf db sg bh hs mt 1 2 3 4 5 6 7 1 1. Electromagnetic induction and alternating current revision notes. L2a 2 current density in terms of velocity of charge. Inside the battery current flows from the negative to the positive terminal. The physics is one of the oldest academic disciplines, perhaps the oldest through the inclusion of astronomy. Electric current is measured in amperes amps, symbol a. An electric circuit is a complete path through which electricity travels circuits are made up of wires and electrical parts such as batteries, light bulbs, resistors, motors and switches. Selina concise physics class 9 icse solutions current electricity. Aug 24, 2018 selina concise physics class 9 icse solutions current electricity icse solutionsselina icse solutions provides step by step solutions for selina concise icse solutions for class 9 physics chapter 9 current electricity. Home notes current electricity download free and get a copy in your email x.
Physics notes electricity example 2 in an electrolyte, both. Current through a given area of a conductor is the net charge passing per unit time through the area. Now download all iitjee study materials notes books. Get here ncert solutions for class 12 physics chapter 3. Electrical current is the flow of charged particles. The current density, which we have defined as the current thr ough unit ar ea nor mal to the curr ent is also dir ected along e, and is also a vector j j ee. Components in series have to share the same current. The current flowing through the smaller arc of the circle in a is. At the jinx of the moment for reference, notes was provided containing all important topics. Read all the important points and chapterwise notes on cet. The direction of drift velocity for electron in a metal is opposite to that of applied. The electrons in a current flows from negative to positive. Direct current is when the current from the energy source goes in one direction to the object that will be using the energy example.
Physics current electricity mcq translation in hindi. Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their relation with electric current. Can anyone share his or her jee study material with me like dlp. Introduction of current electricity study material for. Pdf determination of resistance electric current and resistance.
Ohms law, electrical resistance, vi characteristics linear and nonlinear, electrical energy and power, electrical resistivity and conductivity, carbon resistors, colour code for. The current is then given by the charge passing through the area in unit time. Xii301current electricity2016 pradeep kshetrapal physics. J nqqv resistance and ohms law resistance is defined as a measure of the ease of current flow, and is the ratio of the potential difference to the current ohms law. National council of educational research and training ncert. Surely read from pradeep sirs note, pradeep sir current electricity is very well organized, you can meet pradeep sir from here. Upload study notes if you have your own study notes which you think can benefit others, please upload on learnpick. This topic covers current electricity of o level physics. Electric current and drift velocity jee mainsneet duration.
Pradeep kshetrapal current electricity genius physics. In the last two millennia, physics was a part of natural philosophy, chemistry, certain branches of mathematics and biology, but during the scientific revolution in the 17th century, the natural sciences emerged as unique. Electrical current is described as a flow of electrons. Electric current is the rate of flow of charge round a circuit. Current electricity 95 number of electrons travelling in any direction will be equal to the number of electrons travelling in the opposite direction. In a simple circuit that is used to light a bulb with a battery, the battery provides direct currenta current flowing in only one direction. Powerpoint slide on current electricity compiled by birbal kushwaha. A uniform wire of length 5 cm is carrying a steady current. Cbse chapter wise practice papers with solution for class 12 physics chapter 3 current electricity for free download in pdf format. Introduction of current electricity study material for iit.
You can find notes and exam questions for additional math, elementary math, physics, biology and chemistry. This document is highly rated by class 12 students and has been viewed 25904 times. Electromagnetic induction and alternating current revision. Find materials for this course in the pages linked along the left.
1002 1123 740 1359 1479 772 246 506 415 1583 594 913 925 801 668 62 1165 1578 138 532 1074 913 844 148 1441 1029 56 436 1503 549 1241 815 1454 103 1364 55 1457 1437 603 729 683 1141