Category Archives: JEE Main

JEE Main  is the prestigious examination in India for admissions to NIT,IIIT and other  state engineering colleges.

It is also the gateway for JEE advanced which is the examination for IIT’s

We  cover all the JEE main related posts here which will be very helpful to students and teacher.

We also give the examination details,syllabus as prescribed the Jee main site

What is Electrical engineering

Electrical engineering is a field of engineering that generally deals with the study and application of electricity, electronics, and electromagnetism.

Electrical engineers design, develop, test and supervise the manufacture of electrical and electronic equipment or the fitting and implementation of such equipment into more complex systems. Some of this equipment includes electric motors, machinery controls, lighting and wiring in buildings, automobiles, aircraft, radar and navigation systems, and power generation, control, and transmission devices used by electric utilities. The equipment also usually involves chips and microprocessors.

Use of concept of electric potential

We already know about electric field and electric potential. We also know that electrostatic field is completely characterized by vector function E(r). The electric field depicts the force exerted on other electrically charged objects by the electrically charged particle the field is surrounding. Now a question arises why do we need introduction of electric potential when we already have electric field for the description of electric force between charges.

Frequently Asked Questions about JEE (Main)

Question 1: What is the new scheme of engineering entrance examination ?
Ans. It has been decided to hold a Joint Entrance Examination (JEE) from the year 2013 for admission to the undergraduate programmes in Engineering in two parts, JEE-MAIN and JEE-ADVANCED. Only the top 150000 candidates based on performance in JEE MAIN will qualify to appear in the JEE ADVANCED examination.
Admissions to IITs will be based only on category-wise All India Rank (AIR) in JEE ADVANCED, subject to condition that such candidates are in the top 20 percentile (category wise) in their respective Boards/Qualifying Examinations.

Admission to NITs will be based on 40 % weightage

What is heat?

1)The mean energy transferred between the two system as a result of pure thermal interaction is called Heat.It is the transfer of energy from the higher temperature object to a lower temperature object.

2) The total amount of energy transferred as heat is conventionally written as Q for algebraic purposes. Heat released by a system into its surroundings is by convention a negative quantity (Q < 0); when a system absorbs heat from its surroundings, it is positive (Q > 0).

3) Heat is similar to work as both represent ways of transferring the energy.

Uses of Capacitor

1) The main purpose of the capacitor is to store charge . If an instantanous strong current is to be flown in a circuit,the best way would be to connect the terminals of the circuit to a charge capacitor

2 A capacitor can store electric energy when disconnected from its charging circuit, so it can be used like a temporary battery. Capacitors are commonly used in electronic devices to maintain power supply while batteries are being changed. (This prevents loss of information in volatile memory.)