enEnglishguગુજરાતી
GUJCET · Physics · Magnetism And Matter
A domain in a ferromagnetic substance is in form of cube of side length \(2 \mu m\). It contains \(4 \times 10^{14}\) atoms and each atomic dipole has a moment of \(16 \times 10^{-24} Am ^2\), then the magnetization of the domain is then _________ .
- A \(8 \times 10^4\)
- B \(7.2 \times 10^4\)
- C \(3.6 \times 10^4\)
- D \(64 \times 10^4\)
Answer & Solution
Correct Answer
(A) \(8 \times 10^4\)
Step-by-step Solution
Detailed explanation
A
Magnetization
\(M =\frac{n m}{V}\)
\(\begin{array}{l}\therefore \quad M=\frac{4 \times 10^{10} \times 16 \times 10^{-24}}{\left(2 \times 10^{-6}\right)^3} \\ \therefore \quad M=8 \times 10^4 Am ^{-1}\end{array}\)
Magnetization
\(M =\frac{n m}{V}\)
\(\begin{array}{l}\therefore \quad M=\frac{4 \times 10^{10} \times 16 \times 10^{-24}}{\left(2 \times 10^{-6}\right)^3} \\ \therefore \quad M=8 \times 10^4 Am ^{-1}\end{array}\)
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
- The repulsive force between two particles of same mass and charge, separated by a certain distance is equal to the weight of one of them. The distance between them is ______ \(\times 10^{-1} m\).
Mass of particle \(=1.66 \times 10^{-27} kg\)
Charge of particle \(=1.6 \times 10^{-19} C\)
\(k=9 \times 10^9 MKS , g=10 ms^{-2}\)GUJCET 2016 Medium - A circular coil of area \(2 cm^2\) is placed in a magnetic field of 3 T perpendicularly the coil has 10 turns and \(5 \Omega\) resistance. Now the coil is removed from magnetic field in 0.2 s . The value of induced charge flowing through the coil is _________ .GUJCET 2023 Easy
- If charge \(q\) is placed on one of the vertex of a cube. Then flux passing through any one surface of cube is ________.GUJCET 2020 Hard
- The defletion in moving coil galvanometer falls from 50 divisions to 10 divisions, when a shunt of \(12 \Omega\) is connected with it. The resistance of galvanometer coil is _________.GUJCET 2008 Medium
- If in compound microscope objective with focal length 1.0 cm, eyepiece with focal length 2.0 cm, tube length of 20 cm and near point for an observer is 25 cm. Then value of magnification of compound microscope will be ___________.GUJCET 2026 Easy
- A galvanometer of resistance \(50 \Omega\) is connected to a battery of 8 V along with a resistance of \(3950 \Omega\) in series. A full scale deflection of 30 division is obtained in the galvano meter. In order to reduce this deflection to 15 division the resistance in series should be _________ \(\Omega\).GUJCET 2015 Medium
More PYQs from GUJCET
- A bar magnet of magnetic moment \(\overrightarrow{ M }\) is placed in a magnetic field of induction \(\vec{B}\). The torque exerted on it is ________.GUJCET 2007 Medium
- Which product is obtained between reaction of \(CH _3 ONa\) and \(\left( CH _3\right)_3 CBr\) ?GUJCET 2023 Medium
- If the energy of photons corresponding to wavelength of \(6000 \)Å is \(3.2 \times 10-19 \mathrm{~J}\). The photon energy for wavelength \(4000\)Å will be _________ .GUJCET 2018 Medium
- Oxygen available from the nature belongs to which biodiversity conservation category?GUJCET 2026 Easy
- \(\cot ^{-1}\left(\frac{\sqrt{1+x^2}-1}{x}\right)=\) ____________GUJCET 2018 Hard
- To increase the charge on the plates of a capacitor means _________.GUJCET 2007 Medium