Title 15. WAVES.pdf ✅

PAPER 1 (1.) In transverse wave motion of the particle is the wave direction of propagation (1) Along (2) Perpendicular to (3) Opposite from (4) Parallel to (2.) A sound wave is an example of a wave (1) Rayleigh (2) Interrupted (3) Longitudinal (4) Transverse (3.) The amplitude of wave is a measure of its (1) Frequency (2) Intensity (3) Wave length (4) None of these (4.) Wave speed is the period of a wave (1) Directly proportional to (2) Independent of time (3) Directly proportional to 2 T (4) Inversely (5.) A string of mass 2.5 kg is under tension of 200 N . The length of the stretched string is 20.0 m . If the transverse jerk is struck at one end of the string, the distrubance will reach the other end in : (1) 1 s (2) 0.5 s (3) 2 s (4) Data given is insufficient (6.) What kind of waves vibrates our eardrums so we can hear (1) Micro waves (2) Water waves (3) Light waves (4) Sound waves (7.) What kind of waves transfers energy (1) Mechanical waves (2) Electromagnetic wave (3) Both (a) and (b) (4) None (8.) What type of wave is a sound wave ? (1) Transverse and machenical (2) Transverse and electromagnetic (3) Longitudinal and machenical (4) Longitudinal and electromagnetic (9.) As frequency of a wave increases (1) Wavelength increases (2) Wavelength decreases (3) Energy decreases (4) Both (b) and (c) (10.) A wave has wavelength of 10 m and a speed of 340 m / s . What is the frequency of the wave (1) 34 m / s (2) 3400 Hz (3) 3400 m / s (4) 34 Hz (11.) The super position of two waves creates


(1) 20 Hz (2) 30 Hz (3) 40 Hz (4) 10 Hz (21.) An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm . The next larger length of the column resonating with the same tunign fork is : (1) 150 cm (2) 200 cm (3) 66.7 cm (4) 100 cm (22.) A string is stretched between fixed points separated by 75.0 cm . It is observed to have resonant frequencies of 420 Hz and 315 Hz . There are no other resonant frequencies between these two. The lowest resonant frequency for this string is : (1) 10.5 Hz (2) 105 Hz (3) 155 Hz (4) 205 Hz (23.) With propagation of longitudinal waves through a medium, the quantity transmitted is : (1) Matter (2) Energy (3) Energy and matter (4) Energy, matter and momentum (24.) The fundamental frequency of closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both the ends is : (1) 120 cm (2) 140 cm (3) 80 cm (4) 100 cm (25.) The length of the wire between two ends of a sonometer is 100 cm . What should be the positions of two bridges below the wire so that the three segments of the wire have their fundamental frequencies in the ratio 1:3:5 . (1) 1500 500 cm, cm 23 23 (2) 1500 300 cm, cm 23 23 (3) 300 1500 cm, cm 23 23 (4) 1500 2000 cm, cm 23 23 (26.) The relation between phase difference (Δ ) and path difference (Δx) is (1) 2 Δ Δx    = (2) Δ 2 Δ   = x (3) 2 Δ Δx   = (4) 2Δ Δ x   = (27.) An air column in a pipe, which is closed at one end, will be in resonance with a vibrating body of frerquency 166 Hz , if the length of the air column is : (Velocity of sound = 332 m / s ) (1) 2.00 m (2) 1.50 m (3) 1.00 m (4) 0.50 m (28.) The frequencies of two sound sources are 256 Hz and 260 Hz . At t = 0 , the intensity of sound is maximum. Then the phase difference at the time t =1/16 sec will be : (1) Zero (2)  (3)  /2 (4)  /4