AP EAMCET · PHYSICS · Oscillations
The bob of simple pendulum is hanging vertically down from a fixed identical bob by means of a sting of length \(l\). If both bobs are charged with a charge \(q\) each, time period of the pendulum is : (ignore the radii of the bobs)
- A \(2 \pi \sqrt{\frac{l}{g+\left(\frac{q^2}{l^2 m}\right)}}\)
- B \(2 \pi \sqrt{\frac{l}{g-\left(\frac{q^2}{l^2 m}\right)}}\)
- C \(2 \pi \sqrt{\frac{l}{g}}\)
- D \(2 \pi \sqrt{\frac{l}{g-\left(\frac{q^2}{l}\right)}}\)
Answer & Solution
Correct Answer
(C) \(2 \pi \sqrt{\frac{l}{g}}\)
Step-by-step Solution
Detailed explanation
There will be a electrostatic repulsion between two charged bobs, but it does not affect the motion of pendulum. Thus, time period of pendulum remains same i.e., \(T=2 \pi \sqrt{\frac{l}{g}}\).
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 solenoid having 100 turns per \(\mathrm{cm}\) carries a current of \(\frac{4}{\pi}\) A. At the centre of it is placed a coil of 200 turns of cross-sectional area \(25 \mathrm{~cm}^2\) having its axis parallel to the field produced by the solenoid. When the direction of the current in the solenoid is reversed with in \(0.04 \mathrm{~s}\), the induced emf in the coil isAP EAMCET 2022 Medium
- The electric potential on the surface of a charged spherical conductor of radius \(5 \mathrm{~cm}\) is \(200 \mathrm{~V}\). Work done in moving a charge of \(+5 \mathrm{C}\) from a point \(A\) to another point \(B\) situated at distances of \(15 \mathrm{~cm}\) and \(10 \mathrm{~cm}\) respectively from the centre of the sphere isAP EAMCET 2020 Hard
- The amplitude of a wave, represented by displacement equation
\(y=\frac{1}{\sqrt{a}} \sin \omega t \pm \frac{1}{\sqrt{b}} \cos \omega t\) will beAP EAMCET 2023 Medium - If the function \(\sin ^2 \omega t\) ( \(t\) is time in second) represents a periodic motion, then the period of the motion isAP EAMCET 2025 Medium
- The energy of \(E\) of a system is function of time \(t\) and is given by \(E(t)=\alpha t-\beta t^3\), where \(\alpha\) and \(\beta\) are constants. The dimensions of \(\alpha\) and \(\beta\) areAP EAMCET 2022 Easy
- A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull of the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)AP EAMCET 2019 Hard
More PYQs from AP EAMCET
- Which of the following sets are correctly matched?
Molecule Hybrididization Geometry I. \(\mathrm{BrF}_5\) \(\mathrm{sp}^3\mathrm{d}^2\) square pyramidal II. \(\mathrm{XeF}_6\) \(\mathrm{sp}^3\mathrm{d}^3\) Distorted octahedral III. \(\mathrm{SF}_4\) \(\mathrm{dsp}^2\) square planar IV. \(\mathrm{PbCl}_2\) sp linear AP EAMCET 2025 Medium - From a group of 50 students, two sections comprising of 20 and 30 students are formed. If Ram and Rahim are two particular students among the 50 students, then the probability that they both belong to the same section isAP EAMCET 2019 Medium
- A block \(B\), lying on a table, weights \(w\). The coefficient of static friction between the block and the table is \(\mu\). Assume that, the cord between \(B\) and the knot is horizontal. The maximum weight of the block \(A\) for which the system will be stationary is
AP EAMCET 2021 Medium - If \(\alpha, \beta\) and \(\gamma\) are the roots of the equation \(x^3+a^2+b x\) \(+c=0\), then the roots of the equation \(x^3+\left(2 b-a^2\right) x^2+\) \(\left(b^2-2 a c\right) x-c^2=0\) areAP EAMCET 2023 Medium
- If \(11 \%\) of the power of a 200 W bulb is converted to visible radiation, then the intensity of the light at a distance of 100 cm from the bulb isAP EAMCET 2025 Medium
- When of a non-volatile, non-electrolytic solute have the empirical formula is dissolved in of water, the solution freezes at . The molecular formula of the solute is ( of water )AP EAMCET 2018 Hard