Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Magnetism and Matter question

2024 · Q198
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Magnetism and Matter
  5. /2024 · Q198

Magnetism and Matter question

2024 · Q198

NEETPhysicsMagnetism and MatterMCQ+4 / −1

An iron bar of length LLL has magnetic moment MMM. It is bent at the middle of its length such that the two arms make an angle 60∘60^{\circ}60∘ with each other. The magnetic moment of this new magnet is :

  1. A
    MMM
  2. B
    M2\frac{M}{2}2M​
  3. C
    2M2 M2M
  4. D
    M3\frac{M}{\sqrt{3}}3​M​
View written solutionFree

Correct answer: B

NEET 2024 Physics - Magnetism and Matter Question 6 English Explanation

$$ \begin{aligned} \& \Delta l=2 \frac{I}{2} \sin 30^{\circ} \\ \& =\frac{I}{2} \\ \& M^{\prime}=m I / 2 \\ \& =M / 2 \end{aligned} $$

PreviousNext

More from Magnetism and Matter

  • The magnetic potential energy, when a magnetic bar of magnetic moment m is placed perpendicular to the magnetic field B is2024 · MCQ
  • The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and ε is a small positive number) is2024 · MCQ
  • The magnetic moment and moment of inertia of a magnetic needle as shown are, respectively, 1.0×10−2 A m2 and π210−6​ kg m2. If it completes 10 oscillations in 10 s… Includes diagram2024 · MCQ
  • The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60∘ at the centre. The magnetic moment of this arc section is2024 · MCQ
  • The variation of susceptibility (χ) with absolute temperature ( T ) for a paramagnetic material is represented as :2023 · MCQ
  • A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rad s−1. If the vertical component of earth's magnetic field at that place is 2 × 10−5 T and electrical resistance of the…2022 · MCQ
  • In the product F=q(v×B) =qv×(Bi+Bj​+B0​k) For q = 1 and v=2i+4j​+6k…2021 · MCQ
  • A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of , (i) an equilateral tringle of side 'a' (ii) A square of side 'a' The magnetic dipole moments of the coil in each case…2021 · MCQ