how to choose your engineering college


Just scoring well in AIEEE is not enough. What is important is to choose the right field of engineering you wish to pursue and which college should you enroll? In this engineering admission season, Learnhub speaks to experts and students to help you choose the right college and stream of engineering. So get clicking to make the correct choice.
In this lesson, we will try to sort out your confusion on what should be the parameters to pick your engineering college. Should brand take precedence over placements or should faculty be given importance over infrastructure? Let's find out…
1) Faculty: If the faculty is good, the quality of education you will get will also be good. Important tips by experts to check out if the faculty of an engineering institute is good are -:
a) Review the number of faculty members with a PhD degree.
b) Check out the number of faculty members with an M.Tech degree.
c) Find out where your teachers have got their highest degrees. If it is from the same institute in which they are teaching, then the quality of education would not be very good.
d) Find out the faculty-student ratio: A small ratio would mean personalized attention and help you to perform well in academics.
e) Find out if your faculty members are active in research. These research-oriented teachers will normally have a better understanding of the latest developments in the area, and will therefore be in a position to explain better.
f) Number of workshops, seminars conducted by the institute also reflects the quality of an institute.
2) Accreditation: Your institute should be recognized by NAAC, AICTE or NBA. Accreditation is a process of quality assurance whereby programmes in an approved institution is critically apprised to verify whether that programme meets the norms and standards laid down. It is important if you are interested in studying further or even applying for a job/migrating abroad. Get the legal status of the degree you study for. If the school is not well-known, make sure that the degree is recognised.
3) Infrastructure: In fields like engineering, biotechnology and biology, having state-of-the-art and well equipped labs are a must. Also how good are the libraries, computer labs, projection room, etc? Also check out the sports, hostel facilities to know more about your institute.
4) Brand value: The names of some colleges, like IITs, NITs, is enough and have a high brand recall because of their quality of education. This is reflected by the achievements of their alumni and the research output of faculty and graduate students, other colleges have high brand recall due to advertising on a large scale. The brand of an institute also has an impact on its placements. Big companies will make a beeline for IITs and other renowned institutes than compared to other institutes of less repute. Also companies that recruit thousands of students from campuses every year would typically not go to campuses where they are likely to get just 5-10 potential employees.
5) Placements: Check out the campus placements graduates have got to get an understanding about the value of an institute. If big companies and MNCs are coming year after year to recruit students from that institute, it means that the quality of graduates is highly employable.
6) Location: Try to find an engineering institute in metros as there are better placements prospects. Talking about this, Saumil Shrivastava, an alumnus from IIT-Bombay, says, "Always try to go for an institute in Delhi, Mumbai or Bangalore as most big companies recruit engineering students from big cities as it is convenient from them."
7) Other factors -:
A) Status of the institute: A university status typically would mean greater academic freedom for innovation.
B) Updated curriculum
C) Renowned alumni
D) Extracurricular activities
E) A fully-residential campus usually provides a better learning environment.

Source: learnhub.com 

Preparing physics pre-medicalexams


  • For AIPMT test physics is one of the subject to prepare along with Biology and Chemistry. Physics for AIPMT and pre-med examination is usually easy in comparison to that of IITJEE and AIEEE.
  •  If you have a grip over the concepts of physics then you should work on the speed and accuracy with which you attempt questions in this section.
  • This speed and accuracy for attempting questions in physics comes with an experience.
  • Students should use NCERT books for their preparation as these books are very clear in concepts and negligible amount of mathematics is required to understand these books.
  • You could buy MCQ books by various authors available in market or you could also take simulated online test series to check your speed and accuracy.
  • Practice lots of problems to gain confidence in the subject.
  • Most important topics in physics are mechanics and modern physics.

kinematics: position and displacement

Here in this post i have mad an attempt to explain the concept of position , distance and displacement .Hope you like it


Tips for success

1. Find your own deep and compelling reason to successfully learn your subject and pass your exams.

2. Plan your time to include study, revision and social commitments - a balance of having fun, taking breaks and studying is vital.

3. Use multi-coloured Mind Maps® for your notes.

4. Review your notes regularly to reinforce your new-found knowledge.

5. Swiftly skim through your text books and course material before you read them in depth to give you an overview of your subject.

6. Learn how to remember lists of things by linking each item to a location on a journey or route you are familiar with around your town. You could even use your own home.

7. Before you do any revision, warm up by doing some gentle exercise to relieve any tension in your body and to get a rush of healthy oxygen flowing to your brain.

8. Do past papers under thorough exam conditions as often as possible to familiarise yourself with the format and the pressures of working under exam conditions.

9. In an exam, make sure you read the question completely and fully understand what the examiner wants before you allocate your time and begin answering the questions.

10. If you are faced with a mental block breathe deeply, relax and ask yourself "If I did know the answer to this question, what would it be?"

-memory expert
MICHEL TIPPER...................!!!!!!!!!!!http://www.michaeltipper.com/

Nuclear Forces

We already know about gravitational and electrostatic forces now a question arises that does these forces still hold when we talk about nuclear dimensions as gravitational force between two protons is far too less to hold them and electrostatic force between two protons always a force repulsive in nature . So what hold protons together to form a nucleus. Answer is Nuclear forces which are attractive in nature and strong enough to overcome the electrostatic force of repulsion between two protons. So it is the nuclear forces which holds neutrons and protons (nucleons) together to form a nucleus. Nucleus forces are complex in nature and difficult to understand. Some of the properties of nuclear forces are given below.
(1) Nuclear forces are strong attractive forces :- These are strongest forces and are about 100 times stronger then electrostatic forces and about 1038 times stronger then gravitational forces. These are the forces which holds nucleons in a nucleus.
(2) Nuclear forces are short range forces :- The nuclear forces are most effective up to a distance of the order of 10-15m or less. These forces decreases rapidly as the separation distance between nucleons increases and becomes negligible when separation between nucleons is of the order of 10 fermi . The effective range up to which nuclear forces are effective is known as nuclear range.
(3) Nuclear forces are the charge independent :- Nuclear forces acting between two protons , two neutrons and between a proton and neutron have same strength and the nature of force is attractive.
(4) Nuclear forces are not central forces :- These forces do not obey inverse square law. The magnitude of nuclear force depends on the direction of spin of nucleons.
(5) Nuclear forces are saturated forces :- A nucleon experiences the force only due to it nearest neighbouring nucleons.

How to master Physics


  • If you are a student then before attending your class do preparations for your lecture which means go through your text book , read the chapter and prepare for your forthcoming lecture.

  • Try never to miss your lectures and listen them carefully

  • Since you have read your lessen before you can easily clear your doubts and have discussion with your faculty.

  • Never forget to take your notes during your lecture.

  • After going home prepare a fresh copy of your notes and short notes of your lessen so that you can revise them easily while studying for your exams. Yes never forget to jot down your doubts and their possible explainations.

  • After compleating your chapter do not forget to practice related problems as they help you to clear your concepts. The more problems you solve the more comfortable you get with the subject.

  • Revise your lessen regularly so that it becomes impossible for you to forget the chapter.

  • Download SHM - Simple HArmonic Motion notes by physicscatalyst.com

    For more notes and studdy material in physics visit http://physicscatalyst.com

    Simple Harmonic motion (notes) -

    Current electricity (revision sheet)

    1. Ohm’s Law : V=IR


    2. Resistivity : ρ=(A/l)R

    3. Temperature coefficient of resistance : α=( ρ- ρ0)/t = (R-R0)/t

    4. Resistance in series : R=R1+R2+R3+…….

    5. Resistance in parallel : R = 1/R1+1/R2+……

    6. Terminal potential difference V=IR=E-Ir

    7. Cells in series E=E1+E2+…..

    8. Electrical energy W=EIt

    9. Heat produced in a resistor H=I2Rt = VIt

    10. Power dissipated in resistor P=VI + I2R

    11. Maximum current in n rows of m cells each : Imax=mE/2R = nE/2r

    12. Wheatstone bridge when balanced : P/Q = R/S

    13. Kirchoff’s Law : (1) For junction I1+I2+I3+……=0 (2) For a loop I1R1+I2R2+I3R3+……= sum of potential drops

    14. Shunt resistance required to convert galvanometer into ammeter to read upto I amperes: S=(IgG)/(I-Ig) where G is the galvanometer resistance and Ig is the current through galvanometer to produce full scale deflection

    15. Current when n cells are connected in series I=nE/(R+nr)

    16. Current when n cells are connected in parallel I=nE/(nR+r)

    17. For balanced potentiometer E1/E2=l1/l2

    polarisation and polarised light


  • Light wave is said to be polarised when the vibration of its electric vector are confined to one direction in plane perpandicular to its direction of propagation.

  • When light is polarised its intensity reduces to 50% of the intensity of unpolarised lighy.

  • when we pass a polarised light through a polaroid and we rotate the polaroid about the direction of propagation of the light then the intensity of light changes as per the Law of Malus where intensity I=I0cos2θ

  • Polarised light can be obtained by reflection , refraction and scattering of unpolarised light.

  • Polarisation of light can only be detected by a polaroid.

  • Forces on charged particles in electric and magnetic field

    Things you should know


    (A) If a charged particle is following a circular path of radius r under the influence of perpendicular electric field for example in case of electron moving around nucleus in an atom then,

    (1) the force on the charged particle is inversely proportional to the square of radius of the circular path F α 1/r2

    (2) The velocity of charged particle is inversely proportional to the square of the radius of circular path v α 1/√r

    (3) The square of time period of revolution the charged particle is directly proportional to the cube of radius of circular path T2α r3

    (B) When a charge particle is projected perpendicular to the magnetic field,

    (1) It’s path is circular in plane perpendicular to the plane of magnetic field and direction of motion of charged particle.

    (2) The speed and kinetic energy of particle would remain constant

    (3) The velocity of charged particle only changes its direction not its magnitude

    (4) The force acting on charged particle is independent of the radius of circular path but depends on the velocity of charged particle.

    (5) The time period of revolution is independent of both velocity and radius of circular path of the particle.

    (C) The net magnetic force on a current loop in a uniform magnetic field is zero but torque may or may not be zero

    (D) The net magnetic force on a current loop in a non-uniform magnetic field is not zero but torque may or may not be zero.

    (E) The torque on the coil is maximum , when the coil is suspended in the radial magnetic field.

    IITJEE physics questions

    Question 1
    A glass of soft drink with ice cubes floating on it is taken to an elevator which is accelerating in downwards direction. Then portion of ice inside softdrink
    (a) increases
    (b) decreases
    (c) remains same
    (d) depends on the density of soft drink

    Question 2
    A shell of mass m is at rest initially. It explodes into three fragments having masses in the ratio 2:2:1. THe fragments having equal masses fly off along mutuall perpandicular directions with speed v. What will be the speed of the third fragment.
    (a) v
    (b)√v
    (c) 2√2 v
    (d) 3√2 v

    Question 3
    If a particle moving in a magnetic field , increases its velocity, then its radius of magnetic field energy will

    (a) remain constant
    (b) decrease
    (c) increase
    (d) either b or c


    Question 4
    A particle of charge q and mass m moves in a circular orbit of radius r with angular speed ω. The ratio of magnitude of its magnetic moment to that of its angular momentum depends on

    (a) q and m
    (b) ω , m and q
    (c) ω and q
    (d) ω and m


    Question 5
    Two coils are placed close to each other. The mutual induction of the pair of coils depends upon

    (a) rates at which currents are changing in the coil
    (b) relative position and orientation of two coils
    (c) the material of the wires of the coil
    (d) the currents in the two coils


    Question 6
    An eye specialist prescribed spectacles having an combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm . The power of this combination in diopters is

    (a) +1.5
    (b) -1.5
    (c) +6.67
    (d) -6.67


    Question 7
    To observe the phenomenon of interference, we need tow sources emitting light of

    (a) nearly same frequency
    (b) the same frequency
    (c) different wavelengths
    (d) same frequency and having definite phase relationship


    Answers
    1. c
    2. c
    3. c

    4. a
    5. b Mutual inductance of pair of coils depends on relative position and orientation of the two coils. This is in addition to other factors not given in the alternatives.
    6. b use P=P1+P2 where p is total power of combination of lenses
    7. d

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