JEE MAINS 2018

JEE Mains 2018 Summary Joint Entrance Examination (JEE) Main is conducted to offer admissions to interested candidates in undergraduate engineering programmes at NITs (National Institutes of Technology), IIITs (Indian Institutes of Information Technology) and other centrally funded technical institutions (CFTIs) located across the country. JEE Main 2018 offline (pen-paper) exam will be held on April 8 while the online exam will be held on April 15 and 16. JEE Main 2018 registrations has commenced from December 1 and concluded on January 1, 2018. The admit cards for the exam are now avilable for download. Check JEE Main 2018 important dates here! JEE Mains Pattern 2018 JEE Main 2018 Exam Pattern: This engineering entrance exam will have two papers. Candidates seeking admission in BE/BTech programmes at NITs, IIITs and CFTIs appeared for Paper-1 whereas Paper-2 IS given by aspirants for architecture and planning programmes. This engineering entrance exam is of three hour duration which candidates gave in either of the two mediums, that is: Computer Based Exam Pen-Paper Based Exam A total of 90 questions is asked in this engineering entrance exam. These questions were asked from different subjects. JEE Main 2018 syllabus listed the topics in which aptitude of candidates can be tested. View the detailed syllabus for JEE Main 2018 here. JEE Main 2018 Computer Based Exam (CBE) is of three hour duration and consists of question from subjects such as Physics, Chemistry and Mathematics. All questions carry equal weightage.Computer Based Exam.  Marking: The exam pattern for JEE Main is such that for every correct answer candidates are awarded a total of four marks and for every wrong answer one mark is deducted. However, no deduction is made from the total score if no response is selected for a question by the candidate. For every question asked in the exam, only one response is correct so candidates are advised against selecting multiple responses. Pen and Paper Based Examination JEE Main 2018 pen and paper based examination is a three hour duration entrance exam. The JEE Main exam pattern is such that the question paper will be divided into three sections each for Physics, Chemistry and Mathematics . Each section contains multiple choice questions from the specific subject after which the section is named. Each question in the pen and paper based examination will carry equal weightage. Marking: For every correct answer in pen and paper JEE Main examination candidates are given four marks and for every incorrect response ¼ mark, that is, one mark is deducted from the candidate’s score. No deduction is made from the total score of a candidate if he/she has not selected any response for the question. For every question asked in this entrance examination only one out of the four responses is correct. The computer based test and the pen & paper based entrance exam is held on separate dates.  EE Main 2018 Highlights EventDetail Exam NameJoint Entrance Examination (JEE) Main 2018 Conducting AuthorityCentral Board of Secondary Education (CBSE) Exam LevelNational Level Category of ExaminationUndergraduate (UG) Mode of ExamOnline and Offline Duration of Examination3 hours Paper IB.Tech / B.E. Paper IIB.Arch / B.Planning Purpose of ExaminationQualifying examination for admissions into NITs, IITs, and GFTI. Qualifying Test for JEE Advanced which provides admissions into IITs. Type of QuestionsMultiple Choice Questions (MCQ) Total Marks360 Total Number of Questions in Paper90 Questions (30 Questions each in Physics, Chemistry, and Mathematics) Marking Scheme4 marks will be allotted for each correct response. For each incorrect response, 1 mark will be deducted. Selection ProcessAdmission through JoSAA counseling on the basis of the applicant’s All India Rank.

Colossial Magneto

Experiment-1: Colossal Magneto-Resistive (CMR) effect (Web site under construction) Objective: To study the temperature dependence of the magnetoresistance of a LaSrMnO3 thin film. Theory / Background: The colossal magneto-resistive (CMR) manganites (see Wikipedia) are known for their very large MR near their metal insulator transition. The metal insulator transition also coincides with the magnetic ordering. The detailed physics behind this CMR effect has been puzzling for sometime. The present understanding of these compounds is based on the Zener double exchange mechanism with corrections arising from the electron-lattice interactions. Click here to know more about Magnetoresistance and how it can arise in general. Principle & Apparatus: We use van der Pauw method for measuring resistivity by four probe method. In this method four contacts are made at the four corners of a rectangular thin film. A known current is passed through two contacts at one edge while the voltage is measured at the opposite contacts. Method: In the LabView interface the user has two options: 1) Field scan at a fixed temperature 2) Temperature scan at a fixed field. In both cases user has to decide the amount of current for measuring the resistance. In the first case the user has to give fixed temperature while the resistance is measured as a function of the magnetic field in a range decided by the user. In the second one the user has to give a temperature range and the fixed magnetic field value. While the field dependent data are faster the temperature dependence may take more time for stabilizing the temperature. In both the cases the direction of field could be either perpendicular to the film or parallel to it. Detailed Manual: To be added Links to Experiments Internal (inside IITK) 1. Resistance vs Temperature (simulation) 2. Resistance vs Magnetic Field (simulation) External (outside IITK) 1. Resistance vs Temperature (simulation) 2. Resistance vs Magnetic Field (simulation)