The question is given below:
Correct answer: B. B
- A. A
- B. B
- C. C
- D. D
Explanation
L = n * (λ/4)where 'n' represents the harmonic number (n = 1, 3, 5, ... for the first, second, third, etc., resonances).Let's analyze each length shown in the image: * For n = 1 (First Resonance - L1): The image correctly shows L1 as the first resonance, where a node is at the water surface and an antinode is at the open end. L1 = 1 * (λ/4) = λ/4 This matches the value given in the diagram. * For n = 2 (Second Resonance - L2): The "second resonance" in this context refers to the second possible resonant length for the closed-end tube, which corresponds to the third harmonic (n=3). Here, there will be two nodes and two antinodes, or generally (2n-1) nodes and antinodes. L2 = 3 * (λ/4) = 3λ/4 * For n = 3 (Third Resonance - L3): The "third resonance" refers to the third possible resonant length, which corresponds to the fifth harmonic (n=5). L3 = 5 * (λ/4) = 5λ/4
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Physical Quantities and Units
Physical quantities combine a numerical value with a unit, and are expressed using SI base units or derived units such as newtons, joules and pascals. The topic covers prefixes, unit conversion, dimensional analysis, significant figures and measurement uncertainty, while distinguishing scalar quantities from vectors where direction matters.
Practise Measurements
262 free Measurements MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Physical Quantities and Units questions
The given image shows a measuring instrument.On the main scale of this instrument, the purpose of markings above and below the zero mark is to measure theI. depth.II. height.III. thickness.
A bag contains 50 metallic spheres of different diameters. A task is given to students to classify these spheres in terms of their diameters and find the number of spheres that liebetween the range of 0.3 cm and 1.5 cm out of 50 metallic spheres.For classifying as accurately as possible, the MOST appropriate instrument the students should pick from the science lab is
The option that shows three base quantities' units in System International (S.I.) is
The given diagram shows two different scales on a Vernier callipers.The reading on the main scale is
The given figure shows two different scales on a screw gauge
In daily life, the relative change in mass, length and time of an object cannot be observed because the