# NEET Problems | Waves (Part 1) | 2013 to 2017 | Chapterwise Solutions by Rohit Dahiya - Videos

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NEET and AIPMT Solutions – Waves (Part 1) – 2013 to 2017
Q01 – NEET 2013 – 00:20 – 03:11
Q02 – NEET 2013 – 03:12 – 05:36
Q03 – NEET 2013 – 05:37 – 09:48
Q04 – AIPMT 2014 – 09:49 – 13:59
Q05 – AIPMT 2014 – 14:00 – 19:02
Q06 – AIPMT 2014 – 19:03 – 24:15
Q07 – AIPMT 1 2015 – 24:16 – 28:37
Q08 – AIPMT 2 2015 – 28:38 – 32:51
Q09 – AIPMT 2 2015 – 32:52 – 37:17
Q10 – AIPMT 2 2015 – 37:18 – 41:37

Q01 – NEET 2013 – A wave travelling in the +ve x-direction having displacement along y-direction as 1m, wavelength 2? m and frequency of 1/π Hz is represented by :

Q02 – NEET 2013 – If we study the vibration of a pipe open at both ends, then the following statement is not true:
(1) Pressure change will be maximum at both ends
(2) Open end will be antinode
(3) Odd harmonics of the fundamental frequency will be generated
(4) All harmonics of the fundamental frequency will be generated

Q03 – NEET 2013 – A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz, The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz, The unknown frequency is
(1) 260 Hz (2) 254 Hz (3) 246 Hz (4) 240 Hz

Q04 – AIPMT 2014 – The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are – (velocity of sound = 340 ms–1)
(1) 4 (2) 5 (3) 7 (4) 6

Q05 – AIPMT 2014 – If n1, n2 and n3 are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by:

Q06 – AIPMT 2014 – A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be:
(1) 1332 Hz (2) 1372 Hz (3) 1412 Hz (4) 1454 Hz

Q07 – AIPMT 1 2015 – The fundamental frequency of a 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

Q08 – AIPMT 2 2015 – 4.0 g of a gas occupies 22.4 litres at STP. The specific heat capacity of the gas at constant volume is 5.0 JK-1mol-1. If the speed of sound in this gas at STP is 952 m/s, then the heat capacity at constant pressure is
(Take gas constant R = 8.3 JK-1 mol-1)
(1) 8.5 JK-1 mol-1 (2) 8.0 JK-1 mol-1 (3) 7.5 JK-1 mol-1 (4) 7.0 JK-1 mol-1

Q09 – AIPMT 2 2015 – 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 frequencies for this string is :
(1) 105 Hz (2) 155 Hz (3) 205 Hz (4) 10.5 Hz

Q10 – AIPMT 2 2015 – A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4 m/s at an angle of 60° with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air 330 m/s) is:
(1) 97 Hz (2) 100 Hz (3) 103 Hz (4) 106 Hz
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