AP EAMCET · PHYSICS · Magnetic Properties of Matter
Two identical thin bar magnets each of length \(l\) and pole strength \(m\) are placed at right angles to each other with north-pole of one touching south-pole of the other, then the magnetic moment of the system is
- A \(\mathrm{ml}\)
- B \(2 \mathrm{ml}\)
- C \(\sqrt{2} \mathrm{ml}\)
- D \(\mathrm{ml} / 2\)
Answer & Solution
Correct Answer
(C) \(\sqrt{2} \mathrm{ml}\)
Step-by-step Solution
Detailed explanation
Here, distance between two poles \(=\sqrt{2} 1\) Hence, \(\mathrm{M}=\mathrm{m} \times \sqrt{2} \mathrm{l}=\sqrt{2} \mathrm{ml}\)
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
- When an external force with angular frequency \(\omega_d\) acts on a system of natural angular frequency \(\omega\), the system oscillates with angular frequency \(\omega_{\mathrm{d}}\). The condition for the amplitude of oscillations to be maximum isAP EAMCET 2023 Easy
- If the degrees of freedom of a gas molecule is 6, then the total internal energy of the gas molecule at a temperature of \(47^{\circ} \mathrm{C~}(\mathrm{in~} \mathrm{eV})\) is
\(\left(\right.\) Boltzmann constant \(\left.=1.38 \times 10^{-23} \mathrm{~J} \mathrm{~K}^{-1}\right)\)AP EAMCET 2025 Medium - When a convex lens is immersed in a liquid of refractive index equal to \(80 \%\) of the refractive index of the material of the lens, the focal length of the lens increases by \(100 \%\). The refractive index of the liquid isAP EAMCET 2024 Medium
- The work function of a metal is \(2 \mathrm{eV}\). If a radiation of wavelength \(3000 Ã…\) is incident on it, the maximum kinetic energy of the emitted photoelectrons is (Planck's constant \(h=6.6 \times 10^{-34} \mathrm{Js}\); velocity of light \(\left.c=3 \times 10^8 \mathrm{~m} / \mathrm{s} ; 1 \mathrm{eV}=1.6 \times 10^{-19} \mathrm{~J}\right)\)AP EAMCET 2013 Medium
- Which one of the following is not classified as pulse modulationAP EAMCET 2024 Medium
- If the escape velocity of a body from the surface of the earth is \(11.2 \mathrm{~km} \mathrm{~s}^{-1}\), then the orbital velocity of a satellite in an orbit which is at a height equal to the radius of the earth isAP EAMCET 2025 Medium
More PYQs from AP EAMCET
- The number of 5-letter words that can be formed by using the letters of the word SARANAM isAP EAMCET 2018 Easy
- To prepare \(\mathrm{XeF}_6 \cdot \mathrm{Xe}\) and \(\mathrm{F}_2\) are mixed at \(573 \mathrm{~K}\) and \(60-70\) bar in the ratio ofAP EAMCET 2017 Easy
- If \(A(3,4,5), B(4,6,3), C(-1,2,4)\) and \(D(1,0,5)\) are such that the angle between the lines \(D C\) and \(A B\) is \(\theta\), then \(\cos \theta\) is equal toAP EAMCET 2014 Easy
- The energy stored in a capacitor is W. To double the charge on the plates of the capacitor, the additional work to be done isAP EAMCET 2025 Medium
- A plane electromagnetic wave of frequency \(50 \mathrm{MHz}\) travels in free space. If the average energy densities in the electric field and magnetic field are \(\mathrm{K}_{\mathrm{E}}\) and \(\mathrm{K}_{\mathrm{B}}\) respectively, then the correct option in the following isAP EAMCET 2022 Hard
- If the standard enthalpy change \(\left(\Delta_{\mathrm{r}} \mathrm{H}^\theta\right)\) for reaction \(\mathrm{H}_2(\mathrm{~g})+\mathrm{Br}_2(\mathrm{l}) \rightarrow 2 \mathrm{HBr}(\mathrm{g})\) is \(-72.8 \mathrm{~kJ}\), the standard enthalpy of formation \(\left(\Delta_{\mathrm{f}} \mathrm{H}^\theta\right)\) of \(\mathrm{HBr}(\mathrm{g})\) (in \(\left.\mathrm{kJ} \mathrm{mol}^{-1}\right)\) isAP EAMCET 2023 Medium