TS EAMCET · Physics · Magnetic Effects of Current
A circular loop and a square loop are formed from two wires of same length and cross section. Same current is passed through them. Then, the ratio of their dipole moments is
- A 4
- B \(\frac{2}{\pi}\)
- C 2
- D \(\frac{4}{\pi}\)
Answer & Solution
Correct Answer
(D) \(\frac{4}{\pi}\)
Step-by-step Solution
Detailed explanation
Dipole moments due to current carrying circular wire \(M=i A\) Here, \[ \begin{aligned} \frac{M_1}{M_2} & =\frac{i \pi r^2}{i a^2}=\pi\left[\frac{\left(\frac{1}{2 \pi}\right)^2}{\left(\frac{1}{4}\right)^2}\right] \\ & =\pi \frac{16}{4 \pi^2}=\frac{4}{\pi} \end{aligned} \]
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 positive charge \(Q\) is placed on a conducting spherical shell with inner radius \(R_1\) and outer radius \(R_2\). A particle with charge \(q\) is placed at the center of the spherical cavity. The magnitude of the electric field at a point in the cavity, a distance \(r\) from center isTS EAMCET 2017 Medium
- Two non-reactive monoatomic ideal gases have their atomic masses in the ratio The ratio of their partial pressures when enclosed in a vessel kept at a constant temperature is The ratio of their densities isTS EAMCET 2021 Easy
- Electrons ejected from the surface of a metal, when light of certain frequency is incident on it, are stopped fully by a retarding potential of 3 volts. Photoelectric effect in this metallic surface begins at a frequency \(6 \times 10^{14} \mathrm{~s}^{-1}\). The frequency of the incident light in \(\mathrm{s}^{-1}\) is : [Planck's constant \(=6.4 \times 10^{-34} \mathrm{Js}\), charge on the electron \(\left.=1.6 \times 10^{-19} \mathrm{C}\right]\)TS EAMCET 2004 Medium
- A physical quantity \(\mathrm{S}\) is related to four observables \(\mathrm{a}, \mathrm{b}, \mathrm{c}\), \(\mathrm{d}\) as \(\mathrm{S}=\frac{\sqrt{a} b}{c^3 d^4}\). If the percentage errors of measurement in a, b, c, d are \(2 \%, 1 \%, 1 \%\) and \(1 \%\) respectively, then percentage error in the quantity \(\mathrm{S}\) isTS EAMCET 2022 Easy
- If the reading in Fahrenheit scale is twice the reading in Celsius scale, then the reading in Fahrenheit scale isTS EAMCET 2023 Easy
- A body is projected from the ground at an angle of \(\tan ^{-1}(\sqrt{7})\) with the horizontal. At half of the maximum height, the speed of the body is ' \(n\) ' times the speed of projection. The value of ' \(n\) ' isTS EAMCET 2024 Hard
More PYQs from TS EAMCET
- Consider a spherical planet which is rotating about its axis such that the speed of a point on its equator is \(v\) and the effective acceleration due to gravity on the equator is \(\frac{1}{3}\) of its value at the poles. What is the escape velocity for a particle at the pole of this planet.TS EAMCET 2019 Medium
- A mental sphere of radius \(r\) and specific heat \(S\) is rotated about an axis passing through its centre at a speed of \(n\) rotations per second. It is suddenly stopped and \(50 \%\) of its energy is used in increasing its temperature. Then, the raise in temperature of the sphere isTS EAMCET 2002 Hard
- The de Broglie wavelength of a proton is twice the de Broglie wavelength of an alpha particle. The ratio of the kinetic energies of the proton and the alpha particle isTS EAMCET 2024 Easy
- The equation of trajectory of a projectile is \(y=10 x-\left(\frac{5}{9}\right) x^2\). If we assume \(g=10 \mathrm{~ms}^{-2}\), the range of projectile (in metre) isTS EAMCET 2005 Easy
- Two charges are \(+10 \mu C\) and \(-10 \mu C\) are separated by \(10 \mathrm{~cm}\). The magnitude of force acting on another charge \(5 \mu \mathrm{C}\) placed at the midpoint of the line joining the two charges will be [Use \(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9\) in SI unit]TS EAMCET 2022 Easy
- A body starting at from origin and oscillates simple harmonically with a period of . After what time will its kinetic energy be of its total energyTS EAMCET 2022 Hard