MCQ on Sonometer Class 12 | NEET
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MCQs on Sonometer for NEET
1. When a sonometer wire vibrates with one or more loops, the waves produced in the wire are______
(a) Longitudinal and progressive
(b) Transverse and progressive
(c) Transverse and stationary
(d) Longitudinal and stationary
Answer : C
2. When a sonometer wire vibrates with the minimum frequency, it is said to vibrate in its__________
(a) first overtone
(b) second harmonic
(c) fundamental note
(d) octave
Answer: C
3. When a string emits its second harmonic, we get________
(a) two nodes and three antinodes
(b) two antinodes and three nodes
(c) three loops
(d) three antinodes and three nodes
Answer: B
4. When a sonometer Wire vibrates in the second overtone, there are_______
(a) three nodes and three antinodes
(b) four nodes and three antinodes
(c) one node and two antinodes
(d) two nodes and three antinodes
Answer: B
5. The frequencies of the harmonics of a string are_____
(a) of the same pitch
(b) unrelated
(c) in the ratio I: 3:5
(d) in the ratio I:2:3:
Answer: D
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6. A sonometer wire of length I metre, Vibrates n 4 loops. The distance between two consecutive nodes is_______
(a) 10 cm
(b) 25 cm
(c) 50 cm
(d) 60 cm
Answer: B
7. The velocity of transverse waves in a stretched wire depends upon_______
(a) length of the wire
(b) pressure of the surrounding air
(c) linear density of the wire
(d) rigidity modulus of the wire
Answer: C
8. A sonometer wire is so plucked that it Vibrates With two loops. The frequency of the note emitted is the______
(a) fundamental frequenc
(b) second harmonic
(c) third harmonic
(d) second overtone
Answer: B
9. If d is the density of the material of the string, then the natural trequency of a vibrating string is______
(a) directly proportional to density
(b) inversely proportional to density
(c) inversely proportional to the square root of the density
(d) inversely proportional to the square of the density
Answer: C
10. A sonometer wire is emitting a note of frequency n, when stretched by a weight. If the weight is completely immersed in water, then the frequency of the wire______
(a) will be zero
(b) will not change
(c) will decrease
(d) will increase
Answer: C
11. A string of length 2 m is fixed at both ends. If this string vibrates in its tourth normal mode, with a frequency of 500 Hz, then the waves would travel on the string with a velocity of________
(a) 250 m/s
(b) 500 m/s
(c) 750 m/s
(d) 125 m/s
Answer : B
12. A tuning fork of frequency 500 Hz produces 8 beats/second when sounded with a vibrating sonometer wire. What must be the frequency of the sonometer Wire, if a slight increase in its tension produces fewer beats per
second than before ?
(a) 508 Hz
(b) 492 Hz
(c) 500 Hz
(d) 504 Hz
Answer : B
13. A sonometer wire resonates with a given tuning fork.forming standing waves with five antinodes between the two bridges when a mass of 9 kg is suspended from the wire. When the mass is replaced by another mass M, the
Wire resonates with the same tuning fork forming three antinodes for the same position of bridges. The value of M is_________
(a) 5 kg
(b) 12.5 kg
(c) 18 kg
(d) 25 kg
Answer: D
14. A uning fork produces 4 beats/sec, with a sonometer wire of length 40 cm. It is found that when the length is increased to 44 cm, by keeping other factors constant, again 4 beats/sec are produced. What is the frequency of the tuning fork?
(a) 44 Hz
(b) 84 Hz
(c) 100 Hz
(d) 176 Hz
Answer: B
15. A sonometer wire is in unison with a tuning fork of frequency 256 Hz, when the length of the wire between the bridges is 75 cm and only one loop is formed. By keeping the length and tension constant, the wire is made to vibrate with 2 loops. The wire can still be in resonance with a tuning fork, provided the frequency of the tuning fork is__________
(a) 100 Hz
(b) 512 Hz
(c) 384 Hz
(d) 128 Hz
Answer: B
16. A stretched sonometer wire of length 1 metre has a fundamental frequency of 50 Hz. If it is plucked at 25 cm, by keeping the bridge at 50 cm, the frequency of Vibration of the stretched string would be_______
(a) 50 Hz
(b) 75 Hz
(c) 100 Hz
(d) 200 Hz
Answer : C
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