Tiêu đề 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

(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.