INSTRUCTIONS 1. This test will be a 3 hours Test. 2. This test consists of Physics, Chemistry and Mathematics questions with equal weightage of 100 marks. 3. Each question is of 4 marks. 4. There are three parts in the question paper consisting of Physics (Q.no.1 to 30), Chemistry (Q.no.31 to 60) and Mathematics (Q. no.61 to 90). Each part is divided into two sections, Section A consists of 20 multiple choice questions & Section B consists of 10 Numerical value answer Questions. In Section B, candidates have to attempt only 5 questions out of 10. 5. There will be only one correct choice in the given four choices in Section A. For each question 4 marks will be awarded for correct choice, 1 mark will be deducted for incorrect choice and zero mark will be awarded for unattempted question. For Section B 4 marks will be awarded for correct answer and zero for marked for each review / unattempted/incorrect answer. 6. Any textual, printed or written material, mobile phones, calculator etc. is not allowed for the students appearing for the test. 7. All calculations / written work should be done in the rough sheet provided. Time : 3 hrs. Max. Marks : 300 1 MT-2 JEE MAIN (1) 2 3 (2) 3 2 (3) 3 2 (4) 3 2 2 3. The diagram showing the variation of gravitational potential of earth with distance from the centre of earth is (1) R V O r (2) R V O r (3) R V O r (4) R V O r 4. In “Al” and “Si”, if temperature is changed from normal temperature to 70 K then (1) The resistance of Al will increase and that of Si will decrease (2) The resistance of Al will decrease and that of Si will increase (3) Resistance of both decrease (4) Resistance of both increase 5. Two rods of length d1 and d2 and coefficients of thermal conductivities K1 and K2 are kept touching each other. Both have the same area of cross-section, the equivalent thermal conductivity is (1) K1 + K2 (2) K1 d1 + K2 d2 (3) 21 2211 dd KdKd + + (4) K/dK/d( ) dd 2211 21 + + 6. Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring is (1) 0 qf 2R m (2) 0 q 2f R m (3) 0 q 2 fR m p (4) 0 qf 2 R m p 7. A certain amount of gas is taken through a cyclic process (ABCDA) that has two isobars, one isochore and one isothermal. The cycle can be represented on a P-V indicator diagram as : (1) V P A B C D (2) V P A B C D (3) V P A B C D (4) V P A B C D 8. A goods train accelerating uniformly on a straight railway track, approaches an electric pole standing on the side of track. Its engine passes the pole with velocity u and the guard’s room passes with velocity v. The middle wagon of the train passes the pole with a velocity. (1) 2 u v + (2) 1 2 2 2 u v + (3) uv (4) 2 2 2 u v æ ö + ç ÷ è ø 9. A wheel is rotating at 900 r.p.m. about its axis. When power is cut off it comes to rest in 1 minute. The angular retardation in rad/s2 is (1) p/2 (2) p/4 (3) p/6 (4) p/8 10. Two springs of force constants 300 N/m (Spring A) and 400 N/m (Spring B) are joined together in series. The combination is compressed by 8.75 cm. The ratio of energy stored in A and B is A B E E . Then A B E E is equal to : (1) 4 3 (2) 16 9 (3) 3 4 (4) 9 16 Mock Test -1 MT-3 11. A particle of mass m is acted upon by a force F given by the empirical law 2 R F t = v(t). If this law is to be tested experimentally by observing the motion starting from rest, the best way is to plot : (1) log v(t) against 1 t (2) v(t) against t2 (3) log v(t) against 2 1 t (4) log v(t) against t 12. In case of a p-n junction diode at high value of reverse bias, the current rises sharply. The value of reverse bias is known as (1) cut off voltage (2) zener voltage (3) inverse voltage (4) critical voltage 13. Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure. Use this plot to choose the correct choice(s) given below. 8 6 4 2 0 100 200 A B/A (1) Fusion of two nuclei with mass numbers lying in the range of 1 < A>