AP EAMCET · PHYSICS · Magnetic Effects of Current
A charge \(q\) is spread uniformly over an isolated ring of radius \(R\). The ring is rotated about its natural axis with an angular velocity \(\omega\). Magnetic dipole moment of the ring is
- A \(\frac{q \omega R^2}{2}\)
- B \(\frac{q \omega R}{2}\)
- C \(q \omega R^2\)
- D \(\frac{q \omega}{2R}\)
Answer & Solution
Correct Answer
(A) \(\frac{q \omega R^2}{2}\)
Step-by-step Solution
Detailed explanation
Magnetic dipole moment \(\mathrm{M}=n i \mathrm{~A}, n=1, \mathrm{M}=\mathrm{iA}\) The current in the ring, \(i=q / t=q \times f\) Where, \(f=\) frequency of charge…
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
- Two slabs \(A\) and \(B\) of equal surface area are placed one over the other such that their surfaces are completely in contact. The thickness of slab \(A\) is twice that of \(B\). The coefficient of thermal conductivity of slab \(A\) is twice that of \(B\). The first surface of slab \(A\) is maintained at \(100^{\circ} \mathrm{C}\), while the second surface of slab \(B\) is maintained at \(25^{\circ} \mathrm{C}\). The temperature at the contact of their surfaces isAP EAMCET 2008 Hard
- The path difference between two waves given by the equations \(y_1=a_1 \sin \left(\omega t-\frac{2 \pi x}{\lambda}\right)\) and \(y_2=a_2 \sin \left(\omega t-\frac{2 \pi x}{\lambda}+\phi\right)\) isAP EAMCET 2025 Easy
- The relation between \(\mu\) and \(H\) for a specimen of iron is \(\mu=\left[\frac{0.4}{H}+12 \times 10^{-4}\right] \mathrm{Hm}^{-1}\). The value of H which produces flux density of 1 T will be ( \(\mu=\) magnetic permeability, \(\mathrm{H}=\) magnetic intensity)AP EAMCET 2024 Easy
- The machine gun fires 240 bullets per minute. If the mass of each bullet is \(10 \mathrm{~g}\) and the velocity of the bullets is \(600 \mathrm{~ms}^{-1}\), the power (in kW) of the gun isAP EAMCET 2005 Medium
- The refractive index of a material of a planoconcave lens is \(5 / 3\), the radius of curvature is \(0.3 \mathrm{~m}\). The focal length of the lens in air isAP EAMCET 2008 Easy
- When a wave enters into a rarer medium from a denser medium, the property of the wave which remains constant isAP EAMCET 2024 Easy
More PYQs from AP EAMCET
- If a circle \(S\) with radius 5 touches the circle \(x^2+y^2-6 x-4 y-12=0\) at \((-1,-1)\), then the length of the tangent from the centre of the circle \(S\) to the given circle isAP EAMCET 2018 Medium
- A polymer sample contains 10 molecules each with molecular mass 5,000 and 5 molecules each with molecular mass 50,000. The number average molecular mass of the polymer sample isAP EAMCET 2025 Medium
- A pair of lines \(S=\mathbf{0}\) together with the lines given by the equation \(8 x^2-14 x y+3 y^2+10 x+10 y-25=0\) form a parallelogram. If its diagonals intersect at the point \((3,2)\), then the equation \(S=0\), isAP EAMCET 2019 Medium
- Starting from rest, the time taken by a body sliding down on a rough inclined plane at \(45^{\circ}\) with the horizontal is, twice the time taken to travel on a smooth plane of same inclination and same distance. Then the coefficient of kinetic friction isAP EAMCET 2008 Hard
- The ratio of lowest energy in terms of wave numbers of Balmer and Lyman series of lines of atomic spectrum of hydrogen isAP EAMCET 2018 Medium
- Identify the correct equation relating \(\Delta H, \Delta U\) and \(\Delta T\) for 1 mole of an ideal gas from the following ( \(\mathrm{R}=\) gas constant)AP EAMCET 2024 Easy