TS EAMCET · Physics · Waves and Sound
A wire of length \(0.4 \mathrm{~m}\) stretched at both ends vibrates 250 times per second. If the length of the wire is increased by \(0.1 \mathrm{~m}\) and the stretching force is reduced to \(1 / 4^{\text {th }}\) of its original value then the new frequency is
- A \(50 \mathrm{~Hz}\)
- B \(75 \mathrm{~Hz}\)
- C \(100 \mathrm{~Hz}\)
- D \(150 \mathrm{~Hz}\)
Answer & Solution
Correct Answer
(C) \(100 \mathrm{~Hz}\)
Step-by-step Solution
Detailed explanation
We have \(\mathrm{f}=\frac{1}{2 \mathrm{~L}} \sqrt{\frac{\mathrm{T}}{\mu}}\) \(250=\frac{1}{2 \times 0.4} \sqrt{\frac{T}{\mu}}\)....(i) \(f^{\prime}=\frac{1}{2 \times 0.5} \sqrt{\frac{T}{4 \mu}}\)....(ii) Divide equation (ii) by (i), we get…
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
- A long slender rod is welded to a thin circular disc of diameter at a point on its circumference. The rod is in the same plane as that of the disc and forms a tangent to the disc. The radius of gyration of the disc about the rod (in ) isTS EAMCET 2019 Easy
- Consider the following statements A and B and identify the correct answers given below. A. Peltier coefficient is numerically equal to the potential difference across the junctions of the thermocouple through which current is flowing. B. According to Thomson, energy is neither absorbed nor evolved at the junction of a thermocouple but is observed or evolved only along the lengths of both the conductors.TS EAMCET 2005 Hard
- The energy of a photon is equal to the kinetic energy of a proton. If \(\lambda_1\) is the de-Broglie wavelength of a proton, \(\lambda_2\) the wavelength associated with the proton and if the energy of the photon is \(E\), then \(\left(\lambda_1 / \lambda_2\right)\) is proportional toTS EAMCET 2014 Hard
- The potential difference between two parallel plates is \(10^4 \mathrm{~V}\). If the plates are separated by \(0.5 \mathrm{~cm}\), the force on an electron between the plates isTS EAMCET 2010 Easy
- Wires \(A\) and \(B\) have resistivities \(\rho_A\) and \(\rho_B\), \(\left(\rho_B=2 \rho_A\right)\) and have lengths \(l_A\) and \(l_B\). If the diameter of the wire \(B\) is twice that of \(A\) and the two wires have same resistance, then \(\frac{l_B}{l_A}\) isTS EAMCET 2014 Easy
- Consider an electron revolving in a circular orbit of hydrogen atom, whose quantum number is \(n=2\). The velocity of the electron in that orbit isTS EAMCET 2018 Easy
More PYQs from TS EAMCET
- Assertion (A) Propagation of light through an optical fibre is due to total internal reflection taking place at the core-clad interface. Reason (R) Refractive index of the material of the core of the optical fibre is greater than that of air.TS EAMCET 2005 Easy
- In an experiment, light passing through two slits separated by a distance of \(0.3 \mathrm{~mm}\) is projected on to a screen placed at \(1 \mathrm{~m}\) from the plane of slits. It is observed that the distance between the central fringe and the adjacent bright fringe is \(1.9 \mathrm{~mm}\). The wavelength of light in \(\mathrm{nm}\) isTS EAMCET 2018 Easy
- If the rate of change in electric flux between the plates of a capacitor is \(9 \pi \times 10^3 \mathrm{Vms}^{-1}\), then the displacement current inside the capacitor isTS EAMCET 2025 Easy
- A lamp of power \(942 \mathrm{~W}\) radiates energy uniformly in all direction. The wavelength of radiation is \(660 \mathrm{~nm}\). The photon flux on a small screen \(5.0 \mathrm{~m}\) from the lamp in units of \(\frac{\text { photon }}{m^2 \cdot s}\) is [Take Planck's constant \(h=6.6 \times 10^{-34}\) SI unit)TS EAMCET 2022 Medium
- When light of an unknown polarisation is examined with a polaroid, it is found to exhibit maximum intensity \(I_0\) along \(y\)-axis and minimum intensity \(\frac{2 Y_0}{3}\) along \(x\)-axis. The intensity transmited through a polaroid with pass axis at \(45^{\circ}\) to \(y\)-axis (in \(x\) - \(y\) plane) isTS EAMCET 2019 Medium
- Given the fact that
A) Magnetic field exerts force only on a moving charge
B) Electric field exerts force on both stationary and moving charge
C) Magnetic field exerts force on charge moving parallel to the direction of the field.
Which of the following is true?TS EAMCET 2021 Medium