MHT CET202411 May 2024Morning ShiftPhysicsMagnetic Properties of MatterActual
A bar magnet has length 4 cm , cross-sectional area 2 ~cm ^2 and magnetic moment 6 Am ^2 . The intensity of magnetisation of bar magnet is
Options
- A9 10^5 ~A / m
- B7.5 10^5 ~A / m
- C4.5 10^5 ~A / m
- D3.0 10^5 ~A / m
Correct answer
B. 7.5 10^5 ~A / m
Step-by-step solution
Intensity of magnetization aligned & = M_ net Volume & = M_ net length area of cross-section & = 6 (4 10⁻² ) (2 10⁻⁴ ) =7.5 10^5 ~A / m aligned