Title NEET - 08 - 2024.pdf ✅

Topic Covered PHYSICS : Work, Power and Energy, Wave-I CHEMISTRY : Reaction Mechanism of Organic Compounds, Chemical Equilibrium BIOLOGY : Molecular Basis of Inheritance (Botany), Evolution (Zoology) ALL INDIA NEET TEST SERIES-UG-2023-24 DURATION : 200 Minutes DATE : MARKS : 720
PHYSICS SECTION - A Attempt All 35 Questions (1.) Transverse waves are generated in two steel wires A and B with a source of 512 Hz . If their diameters are in the ratio 2:1 and tensions in the ratio 2:1 , the velocities of the waves are in the ratio: (1) 2 :1 (2) 1: 2 (3) 1: 2 (4) 2:1 (2.) Water waves are : (1) Longitudinal (2) Transverse (3) Both longitudinal and transverse (4) Neither longitudinal nor transverse (3.) A medium can carry a longitudinal wave because it has the property of : (1) Mass (2) Elasticity & Density (3) Compressibility (4) None of these (4.) Transverse waves can propagate : (1) Both is a gas and in a metal (2) In a gas but not in a metal (3) Not in a gas but in a metal (4) Neither in a gas nor in a metal. (5.) Velcoity of sound in air : (i) increases with increase in temperature (ii) decreases with decrease in temperature (iii) increase with decrease in pressure (iv) is independent of pressure (v) is independent of temperature Choose the correct answer : (1) only i and ii are true (2) only i and iii are true (3) only ii and iii are true (4) only i and iv are true (6.) The speed of sound is independent of change of: (1) Temperature (2) Density (3) Pressure( at constant temperature)
(4) All of the above (7.) Acompression is formed at a place in the medium. The rarefaction will be formed at the same place after a time : (1) T (2) T /3 (3) T /2 (4) 2 T (8.) A wave is represented by the equation 2 4sin 3 3 x y t      = −         where x is in meters and t in seconds. The velocity of the wave is: (1) 1 m / s (2) 2 m / s (3) 5 m / s (4) 10 m / s (9.) Two simple harmonic motions are represented by equations y t y t 1 2 = +  = 4sin 10 5cos10 (  ) What is the phase difference between their velocities? (1)  (2) − (3) 2       +   (4) 2       −   (10.) In the given progressive wave equation y = 0.5sin (10 5 t x − ) where x y, in cm and t in second. The maximum velocity of the particle is: (1) 5 cm / s (2) 5 cm / s  (3) 10 cm / s (4) 10.5 cm / s (11.) Velocity of sound in a gaseous medium is 1 330 ms− . if the pressure is increased by 4 times without change in temperature, the velocity of sound in the gas is: (1) 1 330 ms− (2) 1 660 ms− (3) 1 156 ms− (4) 1 990 ms− (12.) In a plane progressive wave given by: y t x = − 25cos 2(   ) the amplitude and frequency are respectively: (1) 25,100 (2) 25,1 (3) 25,2 (4) 50 ,2  (13.) When pressure increased by 1 atmosphere and temperature increases by 1C , the velocity of sound: (1) decreases by 1 0.61 m s− (2) increases by 1 61 m s− (3) decreases by 1 61 m s−
(4) increases by 1 0.61 m s− (14.) The ratio of the velocity of sound in hydrogen gas ( = 7 / 5) to that in helium gas ( = 5 / 3) at the same temperature is: (1) 5 42 (2) 5 21 (3) 42 5 (4) 21 5 (15.) A wave is represented by the equation y t kx = − 0.1sin 100 (  ) If wave velocity is 100 m / s . its angular wave number is equal to: (1) 1 1 m− (2) 1 2 m− (3) 1 m − (4) 1 2 m − (16.) Sound velocity is maximum n : (1) H2 (2) N2 (3) He (4) O2 (17.) If the density of air at NTP is 3 1.293 kg / m and  =1.41 , then the velocity of sound in air at NTP is: (1) 102.3 m / s (2) 252.3 m / s (3) 332 m / s (4) 720 m / s (18.) Which of the following equations represents a wave traveling along y -axis? (1) y A kx t = − sin (  ) (2) x A ky t = − sin (  ) (3) y A ky t = sin cos (4) y A ky t = cos sin (19.) In which medium has sound maximum velocity: (1) In gases (2) In liquids (3) In solids (4) Invacuum (20.) A big explosion on the moon cannot be heard on the earth because : (1) The explosion produces high frequency sound waves which are inaudible (2) Sound waves require a material medium for propagation (3) Sound waves are absorbed in the moon's atmosphere (4) Sound waves are absorbed in the earth's atmosphere.