Title RM-NEET-MM25-180M1320.pdf ✅

- 1 - 1. If P = peta, M = milli and G = giga, then the combination MG P gives : (1) atto (2) nano (3) peta (4) pico 2. If the value of 103.5 kg is rounded off to three significant figures, then the value is : (1) 103 (2) 103.0 (3) 104 (4) 10.3 3. A physical quantity ‘Q’ is found to depend on observables x, y and z, obeying relation 3 2 x y Q . z = The percentage error in the measurement of x, y and z are 1 %, 2 % and 4% respectively. What is percentage error in the quantity Q ? (1) 11 % (2) 4% (3) 1 % (4) 3% 4. Strain and refractive index : (1) No units and no dimensions (2) Both units and dimensions (3) Units but no dimensions (4) Dimensions but no units 5. In the equation, 2 2 b a cos 2 βγ = π α , if the units of a, α and β are m, s-1 and ( ) 1 m s − respectively, then the units of b and γ are : (1) ( ) 1 2 m& m s − (2) ( ) 2 2 m & ms (3) ( ) 1 2 2 m & ms − (4) ( ) 2 m& m/s 6. The velocity of a particle depends upon the time t according to the equation c v ab bt . d t = ++ + The physical quantities which are represented by a, b, c and d, are in the following order : (1) Distance, distance, acceleration, time (2) Distance, acceleration, distance, time (3) Acceleration, distance, distance, time (4) Time, distance, acceleration, distance 7. The side of a cube is 2.5 metre. The volume of the cube to the significant figures is : (1) 15 (2) 16 (3) 1.5 (4) 1.6 8. Assertion : Impulse and momentum are same physical quantities Reason : Both quantities have same unit (1) Assertion is correct, reason is correct : reason is a correct explanation for assertion (2) Assertion is correct, reason is correct : reason is not a correct explanation for assertion (3) Assertion is correct reason is incorrect (4) Assertion is incorrect, reason is correct 9. On a smooth plane surface two blocks are pushed up by a force 20 N as in figure. If mass of A is 1 4 times that of B, the force on B is : 20N A B (1) 4 N (2) 8 N (3) 15 N (4) 16 N 10. The mass of a lift is 500 kg. What will be the tension in its cable if it moves down with an acceleration 2 ms-2 : (1) 4000 N (2) 5000 N (3) 6000 N (4) 3000 N 11. A 6000 kg rocket is set for a vertical firing. If the exhaust speed is 1000 ms-1, the gas ejected per second to supply thrust needed to overcome the weight of the rocket is : (1) 117.6 kg/s (2) 58.8 kg/s (3) 6 kg/s (4) 178.4 kg/s 12. A force of 6 N acts on a body at rest and mass 1 kg. During this time the body attains a velocity of 30 m/s. The time for which the force acts on the body is : (1) 10 sec (2) 8 sec (3) 7 sec (4) 5 sec 13. Two bodies of mass 4 kg and 6 kg are attached to the ends of a string passing over a pulley. The 4 kg mass is attached to the table top by another string. The tension in this string T1 is : 4 kg 6 kg T T T1 (1) 19.6 N (2) 25 N(3) 10.6 N (4) 10 N NEET Model RM-NEET-MM25-180M1320