# Physics Concepts for JEE Mains/ Advanced

Students can now download their Joint Entrance Examination (JEE) Main 2016 admit card from the JEE website. Aspirants will require their application number and password to download it.

However, if applicants have not updated their percentage of marks in class 12/qualifying examination, or roll no of class 12/qualifying examination, they won't be able to download it. Applicants will have to update the information on the first page of their account as they log in on the JEE website. After submitting the required information, applicants can review their changes, and save.

If applicants find are any problems with regards to their admit cards, they can call on the helpline numbers given on the JEE website.

JEE is conducted by the Central Board of Secondary Education (CBSE) every year and is the gateway to IITs, NITs, IIITs, government and private engineering colleges in the country. For 2016, JEE Main offline examination will be conducted on April 3, and online examination on April 9 and 10.

Compensated Pendulum

and

Weight Thermometer

Compensated Pendulum : As we

have

discussed and analy

s

ed in

our

previous articles that the period of a pendulum changes with temperature

,

due to which the time a pendulum clock shows d

ifference

from actual time at temperatures other than graduation temperature of the clocks. To overcome this problem of pendulum clocks, compensated pendulums are made in which time period is not affected by temperature variation. To understand the analysis of compensated pendulums, watch the video given below.

https://youtu.be/fYzB6x0XTaU

Weight Thermometer : In ancient times  when advanced thermometers are not invented, people used different types of thermal setups to measure the temperature of different substances. Weight thermometer is such a temperature measuring setup. It has a container filled with a liquid and with increase in temperature liquid overflows as liquids expands more than solids. By measuring the overflow weight of the liquid, analytically temperature rise can be estimated. To understand the weight thermometer in detail, watch the video given below.

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For detailed Study you should read "Resnick and Halliday". For solving Problems you shuold opt for "Problems in Genral Physics" by I.E. Irodov. For more reference visit

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A  slab of mass m1=40kg rest on a frictionless floor and a block of mass m2 = 10kg rest on top of the slab . Between block and slab static friction coef.=0.60 and kinetic friction coef.=0.40 . The bloc is pulled by a horizontal force og 100N what are the resulting accelerations. of (a) the block and (b) the slab?

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My brother has started prep for JEE mains. Can anybody share some eBooks or  free online material to start with. Like some question bank or so. I got HC Verma PDF. Any other source? Anyone? TIA

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As per the rules of MHRD a candidate is not eligible for any NIT/IIIT/GFTI if he or she has got less than 75% or not being included in the top 20 percentile of their respective board. In  this regard ,if someone gets 74.20% in ISC exam, can this be ROUNDED OFF to a 75.00%?