MHT CET · Physics · Waves and Sound
The frequency of a tuning fork is \(220 \mathrm{~Hz}\) and the velocity of sound in air is \(330 \mathrm{~m} / \mathrm{s}\). When the tuning fork completes 80 vibrations, the distance travelled is
- A \(120 \mathrm{~m}\)
- B \(60 \mathrm{~m}\)
- C \(53 \mathrm{~m}\)
- D \(100 \mathrm{~m}\)
Answer & Solution
Correct Answer
(A) \(120 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
\(
\begin{aligned}
& \mathrm{f}=220 \mathrm{~Hz}, v=330 \mathrm{~m} / \mathrm{s} \\
& v=\mathrm{f} \lambda \\
& \lambda=\frac{\mathrm{v}}{\mathrm{f}}=\frac{330}{220}=\frac{3}{2} \mathrm{~m}
\end{aligned}
\)
Distance travel in 80 vibrations
\(
=80 \times \frac{3}{2}=120 \mathrm{~m}
\)
\begin{aligned}
& \mathrm{f}=220 \mathrm{~Hz}, v=330 \mathrm{~m} / \mathrm{s} \\
& v=\mathrm{f} \lambda \\
& \lambda=\frac{\mathrm{v}}{\mathrm{f}}=\frac{330}{220}=\frac{3}{2} \mathrm{~m}
\end{aligned}
\)
Distance travel in 80 vibrations
\(
=80 \times \frac{3}{2}=120 \mathrm{~m}
\)
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 gases carbon-monoxide (CO) and nitrogen at the same temperature have kinetic energies \(E_{1}\) and \(E_{2}\) respectively. ThenMHT CET 2007 Medium
- Capacity of a capacitor is \(48 \mu \mathrm{F}\). When it is charged from \(0.1 \mathrm{C}\) to \(0.5 \mathrm{C}\), change in the energy stored isMHT CET 2010 Medium
- An organ pipe closed at one end has fundamental frequency of 1500 Hz . The maximum number of overtones generated by this pipe which a normal person can hear is (Normal man can hear the frequency up to 19.5 kHz , Neglect end correction)MHT CET 2025 Medium
- When three capacitors of equal capacities are connected in parallel and one of the same capacity, capacitor is connected in series with the combination. The resultant capacity is \(4.5 \mu \mathrm{~F}\). The capacity of each capacitor isMHT CET 2024 Easy
- Two wires \(2 \mathrm{~mm}\) apart supply current to a \(100 \mathrm{~V}\), \(1 \mathrm{~kW}\) heater. The force per metre between the wires is \(\left(\mu_0=4 \pi \times 10^{-27}\right.\) SI unit)MHT CET 2023 Medium
- An electric dipole is as shown in figure The electric potential at point \(\mathrm{P}\) due to the dipole is \(\left[\epsilon_0=\right.\) permittivity of free space]
MHT CET 2022 Medium
More PYQs from MHT CET
- In semiconductors at room temperature,MHT CET 2024 Medium
- A black body radiates maximum energy at wavelength ' \(\lambda\) ' and its emissive power is \(E\). Now due to change in temperature of that body, it radiates maximum energy at wavelength \(\frac{2 \lambda}{3}\). At that temperature emissive power isMHT CET 2023 Medium
- Two cars A and B start from a point at the same time in a straight line and their positions are represented by \(\mathrm{R}_{\mathrm{A}}(\mathrm{t})=\mathrm{at}+\mathrm{bt}^2\) and \(\mathrm{R}_{\mathrm{B}}(\mathrm{t})=x \mathrm{t}-\mathrm{t}^2\). At what time do the cars have same velocity?MHT CET 2023 Medium
- An electron is projected along the axis of circular conductor carrying current I. Electron will experienceMHT CET 2023 Easy
- Find the rate constant of first order reaction in second having half-life 2.5 hour?MHT CET 2022 Easy
- The reaction of aryl halide with sodium metal in dry ether to give biphenyl is known asMHT CET 2022 Medium