MHT CET · Physics · Waves and Sound
Sound waves of frequency \(600 \mathrm{~Hz}\) fall normally on a perfectly reflecting wall. The shortest distance from the wall at which all particles will have maximum amplitude of vibration is (speed of sound \(=300 \mathrm{~ms}^{-1}\) )
- A \(\frac{1}{4} \mathrm{~m}\)
- B \(\frac{1}{8} \mathrm{~m}\)
- C \(\frac{3}{8} \mathrm{~m}\)
- D \(\frac{7}{8} \mathrm{~m}\)
Answer & Solution
Correct Answer
(B) \(\frac{1}{8} \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
The maximum displacement of the wave will occur at antinode of the wave. The first antinode will be a point where, \(\mathrm{d}=\frac{\lambda}{4}\)
The wavelength is given by,
\(\lambda=\frac{\mathrm{v}}{\mathrm{f}}=\frac{300}{600}\)
So, \(d=\frac{0.5}{4}=\frac{1}{8} m\)
The wavelength is given by,
\(\lambda=\frac{\mathrm{v}}{\mathrm{f}}=\frac{300}{600}\)
So, \(d=\frac{0.5}{4}=\frac{1}{8} m\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The size of the real image produced by a convex lens of focal length \(\mathrm{F}\) is ' \(\mathrm{m}\) ' times the size of the object. The image distance from the lens isMHT CET 2023 Medium
- A string of length ' \(L\) ' fixed at one end carries a body of mass ' \(m\) ' at the other end. The mass is revolved in a circle in the horizontal plane about a vertical axis passing through the fixed end of the string. The string makes angle ' \(\theta\) ' with the vertical. The angular frequency of the body is ' \(\omega\) '. The tension in the string isMHT CET 2023 Medium
- In series LCR circuit, resistance is \(18 \Omega\) and impedance is \(33 \Omega\). An r.m.s. voltage of
\(220 \mathrm{~V}\) is applied across the circuit. The true power consumed in a.c. circuit isMHT CET 2020 Medium - For a particle performing S.H.M. the equation \(\left(\frac{\mathrm{d}^2 \mathrm{x}}{\mathrm{dt}^2}\right)+\alpha \mathrm{x}=0\). Then the time period of the motion will beMHT CET 2022 Medium
- The difference in length between two rods \(A\) and \(B\) is 60 cm at all temperatures. If \(\propto_A=18 \times 10^{-6} /{ }^{\circ} \mathrm{C}\) and \(\propto_B=27 \times 10^{-6} /{ }^{\circ} \mathrm{C}\), then the length of \(\operatorname{rod} A\) and \(\operatorname{rod} B\) at \(0^{\circ} C\) is respectivelyMHT CET 2025 Medium
- Three point charges \(+Q,+2 q\) and \(+q\) are placed at the vertices of a right angled isosceles triangle. The net electrostatic potential energy of the configuration is zero, if \(\mathrm{Q}\) is equal to
MHT CET 2023 Medium
More PYQs from MHT CET
- Two parallel conductors carrying unequal currents in the same direction __________MHT CET 2019 Medium
- The voltage between the plates of a parallel plate capacitor of capacity \(1 \mu \mathrm{~F}\) is changing at the rate of \(4 \mathrm{~V} / \mathrm{s}\). the displacement current in the capacitor isMHT CET 2025 Medium
- Williamson's synthesis involvesMHT CET 2007 Medium
- Which among the following sources contains caryophyllene?MHT CET 2020 Hard
- Identify the products of following reaction:
\(
\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOC}_2 \mathrm{H}_5 \underset{\text { dil. } \mathrm{H}_2 \mathrm{SO}_4}{\longrightarrow}
\)MHT CET 2021 Medium - Silver salt of carboxylic acid on reaction with \(R-X\) givesMHT CET 2009 Medium