IIT JEE question papers

Rahul Parik · #11 October 13th, 2015, 05:12 PM

I am providing question papers of IIT JEE Mains Exam with their detailed solutions in pdf file.

IIT JEE Mains Exam Question Paper 2015

A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m moving in the y direction with speed v. If the collision is perfectly inelastic, the percentage loss in the energy during the collision is close to :
(1) 44 % (2) 50 % (3) 56 % (4) 62 %
Ans: (3)

A solid of constant heat capacity 1 J/°C is being heated by keeping it in contact with reservoirs in two ways : (i) Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies same amount of heat. (ii) Sequentially keeping in contact with 8 reservoirs such that each reservoir supplies same amount of heat. In both the cases body is brought from initial temperature 100°C to final temperature 200°C. Entropy change of the body in the two cases respectively is :

A train is moving on a straight track with speed 20 ms-1. It is blowing its whistle at the frequency of 1000 Hz. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms1) close to :
(1) 6 % (2) 12 % (3) 18 % (4) 24 %

In the circuit shown, the current in the 1 resistor is :
(1) 1.3 A, from P to Q
(2) 0 A
(3) 0.13 A, from Q to P
(4) 0.13 A, from P to Q

A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is :
(1) 1.73 V/m (2) 2.45 V/m (3) 5.48 V/m (4) 7.75 V/m

IIT JEE Mains Exam Solved Question Paper 2015

more papers detail attched in two pdf files;